Home / 20,726.16-28,589.64-12,656.13

Finding the Fourth Proportional to 20,726.16, 28,589.64 and 12,656.13

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Solution

The fourth proportional to 20,726.16, 28,589.64 and 12,656.13 is: 17,457.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.16 : 28,589.64 = 12,656.13 : x
  2. Step 2: Convert to fraction form
    20,726.16/28,589.64 = 12,656.13/x
  3. Step 3: Cross multiply
    20,726.16x = 28,589.64 × 12,656.13
  4. Step 4: Simplify right side
    20,726.16x = 361,834,200.49
  5. Step 5: Solve for x
    x = 361,834,200.49/20,726.16
  6. Step 6: Final answer
    x = 17,457.85

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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.