Home / 15,492.61-21,379.82-8,778.69

Finding the Fourth Proportional to 15,492.61, 21,379.82 and 8,778.69

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Solution

The fourth proportional to 15,492.61, 21,379.82 and 8,778.69 is: 12,114.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.61 : 21,379.82 = 8,778.69 : x
  2. Step 2: Convert to fraction form
    15,492.61/21,379.82 = 8,778.69/x
  3. Step 3: Cross multiply
    15,492.61x = 21,379.82 × 8,778.69
  4. Step 4: Simplify right side
    15,492.61x = 187,686,812.04
  5. Step 5: Solve for x
    x = 187,686,812.04/15,492.61
  6. Step 6: Final answer
    x = 12,114.60

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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.