Home / 30,737.90-42,308.18-21,769.89

Finding the Fourth Proportional to 30,737.90, 42,308.18 and 21,769.89

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Solution

The fourth proportional to 30,737.90, 42,308.18 and 21,769.89 is: 29,964.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,737.90 : 42,308.18 = 21,769.89 : x
  2. Step 2: Convert to fraction form
    30,737.90/42,308.18 = 21,769.89/x
  3. Step 3: Cross multiply
    30,737.90x = 42,308.18 × 21,769.89
  4. Step 4: Simplify right side
    30,737.90x = 921,044,424.70
  5. Step 5: Solve for x
    x = 921,044,424.70/30,737.90
  6. Step 6: Final answer
    x = 29,964.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.