Home / 42,428.72-63,638.16-11,266.40

Finding the Fourth Proportional to 42,428.72, 63,638.16 and 11,266.40

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Solution

The fourth proportional to 42,428.72, 63,638.16 and 11,266.40 is: 16,898.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,428.72 : 63,638.16 = 11,266.40 : x
  2. Step 2: Convert to fraction form
    42,428.72/63,638.16 = 11,266.40/x
  3. Step 3: Cross multiply
    42,428.72x = 63,638.16 × 11,266.40
  4. Step 4: Simplify right side
    42,428.72x = 716,972,965.82
  5. Step 5: Solve for x
    x = 716,972,965.82/42,428.72
  6. Step 6: Final answer
    x = 16,898.29

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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.