Home / 21,323.84-29,430.48-12,378.76

Finding the Fourth Proportional to 21,323.84, 29,430.48 and 12,378.76

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Solution

The fourth proportional to 21,323.84, 29,430.48 and 12,378.76 is: 17,084.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,323.84 : 29,430.48 = 12,378.76 : x
  2. Step 2: Convert to fraction form
    21,323.84/29,430.48 = 12,378.76/x
  3. Step 3: Cross multiply
    21,323.84x = 29,430.48 × 12,378.76
  4. Step 4: Simplify right side
    21,323.84x = 364,312,848.60
  5. Step 5: Solve for x
    x = 364,312,848.60/21,323.84
  6. Step 6: Final answer
    x = 17,084.77

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Double scale
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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.