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Finding the Fourth Proportional to 15,373.70, 21,215.94 and 9,404.10

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Solution

The fourth proportional to 15,373.70, 21,215.94 and 9,404.10 is: 12,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,373.70 : 21,215.94 = 9,404.10 : x
  2. Step 2: Convert to fraction form
    15,373.70/21,215.94 = 9,404.10/x
  3. Step 3: Cross multiply
    15,373.70x = 21,215.94 × 9,404.10
  4. Step 4: Simplify right side
    15,373.70x = 199,516,821.35
  5. Step 5: Solve for x
    x = 199,516,821.35/15,373.70
  6. Step 6: Final answer
    x = 12,977.80

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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.