Home / 21,511.50-29,685.87-12,080.07

Finding the Fourth Proportional to 21,511.50, 29,685.87 and 12,080.07

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Solution

The fourth proportional to 21,511.50, 29,685.87 and 12,080.07 is: 16,670.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.50 : 29,685.87 = 12,080.07 : x
  2. Step 2: Convert to fraction form
    21,511.50/29,685.87 = 12,080.07/x
  3. Step 3: Cross multiply
    21,511.50x = 29,685.87 × 12,080.07
  4. Step 4: Simplify right side
    21,511.50x = 358,607,387.61
  5. Step 5: Solve for x
    x = 358,607,387.61/21,511.50
  6. Step 6: Final answer
    x = 16,670.50

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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.