Home / 20,572.16-28,389.53-11,140.72

Finding the Fourth Proportional to 20,572.16, 28,389.53 and 11,140.72

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Solution

The fourth proportional to 20,572.16, 28,389.53 and 11,140.72 is: 15,374.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.16 : 28,389.53 = 11,140.72 : x
  2. Step 2: Convert to fraction form
    20,572.16/28,389.53 = 11,140.72/x
  3. Step 3: Cross multiply
    20,572.16x = 28,389.53 × 11,140.72
  4. Step 4: Simplify right side
    20,572.16x = 316,279,804.66
  5. Step 5: Solve for x
    x = 316,279,804.66/20,572.16
  6. Step 6: Final answer
    x = 15,374.17

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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.