Home / 15,380.62-21,225-8,666.26

Finding the Fourth Proportional to 15,380.62, 21,225 and 8,666.26

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Solution

The fourth proportional to 15,380.62, 21,225 and 8,666.26 is: 11,959.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.62 : 21,225 = 8,666.26 : x
  2. Step 2: Convert to fraction form
    15,380.62/21,225 = 8,666.26/x
  3. Step 3: Cross multiply
    15,380.62x = 21,225 × 8,666.26
  4. Step 4: Simplify right side
    15,380.62x = 183,941,368.50
  5. Step 5: Solve for x
    x = 183,941,368.50/15,380.62
  6. Step 6: Final answer
    x = 11,959.29

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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.