Home / 15,491.18-21,377.91-9,118.01

Finding the Fourth Proportional to 15,491.18, 21,377.91 and 9,118.01

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Solution

The fourth proportional to 15,491.18, 21,377.91 and 9,118.01 is: 12,582.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,491.18 : 21,377.91 = 9,118.01 : x
  2. Step 2: Convert to fraction form
    15,491.18/21,377.91 = 9,118.01/x
  3. Step 3: Cross multiply
    15,491.18x = 21,377.91 × 9,118.01
  4. Step 4: Simplify right side
    15,491.18x = 194,923,997.16
  5. Step 5: Solve for x
    x = 194,923,997.16/15,491.18
  6. Step 6: Final answer
    x = 12,582.90

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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.