Home / 20,572.14-28,389.75-11,140.89

Finding the Fourth Proportional to 20,572.14, 28,389.75 and 11,140.89

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Solution

The fourth proportional to 20,572.14, 28,389.75 and 11,140.89 is: 15,374.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.14 : 28,389.75 = 11,140.89 : x
  2. Step 2: Convert to fraction form
    20,572.14/28,389.75 = 11,140.89/x
  3. Step 3: Cross multiply
    20,572.14x = 28,389.75 × 11,140.89
  4. Step 4: Simplify right side
    20,572.14x = 316,287,081.88
  5. Step 5: Solve for x
    x = 316,287,081.88/20,572.14
  6. Step 6: Final answer
    x = 15,374.53

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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.