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Finding the Fourth Proportional to 39,915, 55,082.57 and 22,010.28

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Solution

The fourth proportional to 39,915, 55,082.57 and 22,010.28 is: 30,374.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,915 : 55,082.57 = 22,010.28 : x
  2. Step 2: Convert to fraction form
    39,915/55,082.57 = 22,010.28/x
  3. Step 3: Cross multiply
    39,915x = 55,082.57 × 22,010.28
  4. Step 4: Simplify right side
    39,915x = 1,212,382,678.77
  5. Step 5: Solve for x
    x = 1,212,382,678.77/39,915
  6. Step 6: Final answer
    x = 30,374.11

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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.