Home / 21,778.61-30,056.23-12,706.76

Finding the Fourth Proportional to 21,778.61, 30,056.23 and 12,706.76

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Solution

The fourth proportional to 21,778.61, 30,056.23 and 12,706.76 is: 17,536.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,778.61 : 30,056.23 = 12,706.76 : x
  2. Step 2: Convert to fraction form
    21,778.61/30,056.23 = 12,706.76/x
  3. Step 3: Cross multiply
    21,778.61x = 30,056.23 × 12,706.76
  4. Step 4: Simplify right side
    21,778.61x = 381,917,301.11
  5. Step 5: Solve for x
    x = 381,917,301.11/21,778.61
  6. Step 6: Final answer
    x = 17,536.35

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Half scale
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Double scale
Find fourth proportional to 21,779.61, 30,057.61 and 12,707.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.