Home / 20,587.17-28,399.86-13,020.76

Finding the Fourth Proportional to 20,587.17, 28,399.86 and 13,020.76

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Solution

The fourth proportional to 20,587.17, 28,399.86 and 13,020.76 is: 17,962.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.17 : 28,399.86 = 13,020.76 : x
  2. Step 2: Convert to fraction form
    20,587.17/28,399.86 = 13,020.76/x
  3. Step 3: Cross multiply
    20,587.17x = 28,399.86 × 13,020.76
  4. Step 4: Simplify right side
    20,587.17x = 369,787,676.41
  5. Step 5: Solve for x
    x = 369,787,676.41/20,587.17
  6. Step 6: Final answer
    x = 17,962.05

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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.