Home / 15,878.30-21,911.18-8,805.74

Finding the Fourth Proportional to 15,878.30, 21,911.18 and 8,805.74

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Solution

The fourth proportional to 15,878.30, 21,911.18 and 8,805.74 is: 12,151.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,878.30 : 21,911.18 = 8,805.74 : x
  2. Step 2: Convert to fraction form
    15,878.30/21,911.18 = 8,805.74/x
  3. Step 3: Cross multiply
    15,878.30x = 21,911.18 × 8,805.74
  4. Step 4: Simplify right side
    15,878.30x = 192,944,154.17
  5. Step 5: Solve for x
    x = 192,944,154.17/15,878.30
  6. Step 6: Final answer
    x = 12,151.44

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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.