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Finding the Fourth Proportional to 28,174, 38,870.70 and 16,237.12

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Solution

The fourth proportional to 28,174, 38,870.70 and 16,237.12 is: 22,401.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174 : 38,870.70 = 16,237.12 : x
  2. Step 2: Convert to fraction form
    28,174/38,870.70 = 16,237.12/x
  3. Step 3: Cross multiply
    28,174x = 38,870.70 × 16,237.12
  4. Step 4: Simplify right side
    28,174x = 631,148,220.38
  5. Step 5: Solve for x
    x = 631,148,220.38/28,174
  6. Step 6: Final answer
    x = 22,401.80

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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.