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Finding the Fourth Proportional to 42,510.04, 63,772 and 12,920.96

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Solution

The fourth proportional to 42,510.04, 63,772 and 12,920.96 is: 19,383.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,510.04 : 63,772 = 12,920.96 : x
  2. Step 2: Convert to fraction form
    42,510.04/63,772 = 12,920.96/x
  3. Step 3: Cross multiply
    42,510.04x = 63,772 × 12,920.96
  4. Step 4: Simplify right side
    42,510.04x = 823,995,461.12
  5. Step 5: Solve for x
    x = 823,995,461.12/42,510.04
  6. Step 6: Final answer
    x = 19,383.55

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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.