Home / 15,421.29-21,279.09-8,706.77

Finding the Fourth Proportional to 15,421.29, 21,279.09 and 8,706.77

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Solution

The fourth proportional to 15,421.29, 21,279.09 and 8,706.77 is: 12,014.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.29 : 21,279.09 = 8,706.77 : x
  2. Step 2: Convert to fraction form
    15,421.29/21,279.09 = 8,706.77/x
  3. Step 3: Cross multiply
    15,421.29x = 21,279.09 × 8,706.77
  4. Step 4: Simplify right side
    15,421.29x = 185,272,142.44
  5. Step 5: Solve for x
    x = 185,272,142.44/15,421.29
  6. Step 6: Final answer
    x = 12,014.05

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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.