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Finding the Fourth Proportional to 42,643.32, 63,935.04 and 18,938.04

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Solution

The fourth proportional to 42,643.32, 63,935.04 and 18,938.04 is: 28,393.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,643.32 : 63,935.04 = 18,938.04 : x
  2. Step 2: Convert to fraction form
    42,643.32/63,935.04 = 18,938.04/x
  3. Step 3: Cross multiply
    42,643.32x = 63,935.04 × 18,938.04
  4. Step 4: Simplify right side
    42,643.32x = 1,210,804,344.92
  5. Step 5: Solve for x
    x = 1,210,804,344.92/42,643.32
  6. Step 6: Final answer
    x = 28,393.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.