Home / 20,343.17-28,073.55-11,390.68

Finding the Fourth Proportional to 20,343.17, 28,073.55 and 11,390.68

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Solution

The fourth proportional to 20,343.17, 28,073.55 and 11,390.68 is: 15,719.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.17 : 28,073.55 = 11,390.68 : x
  2. Step 2: Convert to fraction form
    20,343.17/28,073.55 = 11,390.68/x
  3. Step 3: Cross multiply
    20,343.17x = 28,073.55 × 11,390.68
  4. Step 4: Simplify right side
    20,343.17x = 319,776,824.51
  5. Step 5: Solve for x
    x = 319,776,824.51/20,343.17
  6. Step 6: Final answer
    x = 15,719.12

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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.