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Finding the Fourth Proportional to 28,690.71, 42,747.71 and 27,079.23

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Solution

The fourth proportional to 28,690.71, 42,747.71 and 27,079.23 is: 40,346.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,690.71 : 42,747.71 = 27,079.23 : x
  2. Step 2: Convert to fraction form
    28,690.71/42,747.71 = 27,079.23/x
  3. Step 3: Cross multiply
    28,690.71x = 42,747.71 × 27,079.23
  4. Step 4: Simplify right side
    28,690.71x = 1,157,574,935.67
  5. Step 5: Solve for x
    x = 1,157,574,935.67/28,690.71
  6. Step 6: Final answer
    x = 40,346.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.