Home / 20,402.19-28,146.96-12,430.58

Finding the Fourth Proportional to 20,402.19, 28,146.96 and 12,430.58

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Solution

The fourth proportional to 20,402.19, 28,146.96 and 12,430.58 is: 17,149.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.19 : 28,146.96 = 12,430.58 : x
  2. Step 2: Convert to fraction form
    20,402.19/28,146.96 = 12,430.58/x
  3. Step 3: Cross multiply
    20,402.19x = 28,146.96 × 12,430.58
  4. Step 4: Simplify right side
    20,402.19x = 349,882,897.30
  5. Step 5: Solve for x
    x = 349,882,897.30/20,402.19
  6. Step 6: Final answer
    x = 17,149.28

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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.