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Finding the Fourth Proportional to 42,043.44, 63,071.28 and 12,457.44

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Solution

The fourth proportional to 42,043.44, 63,071.28 and 12,457.44 is: 18,687.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,043.44 : 63,071.28 = 12,457.44 : x
  2. Step 2: Convert to fraction form
    42,043.44/63,071.28 = 12,457.44/x
  3. Step 3: Cross multiply
    42,043.44x = 63,071.28 × 12,457.44
  4. Step 4: Simplify right side
    42,043.44x = 785,706,686.32
  5. Step 5: Solve for x
    x = 785,706,686.32/42,043.44
  6. Step 6: Final answer
    x = 18,687.97

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1.5x scale

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.