Home / 15,385.88-21,232.54-8,312.31

Finding the Fourth Proportional to 15,385.88, 21,232.54 and 8,312.31

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Solution

The fourth proportional to 15,385.88, 21,232.54 and 8,312.31 is: 11,471.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.88 : 21,232.54 = 8,312.31 : x
  2. Step 2: Convert to fraction form
    15,385.88/21,232.54 = 8,312.31/x
  3. Step 3: Cross multiply
    15,385.88x = 21,232.54 × 8,312.31
  4. Step 4: Simplify right side
    15,385.88x = 176,491,454.57
  5. Step 5: Solve for x
    x = 176,491,454.57/15,385.88
  6. Step 6: Final answer
    x = 11,471.00

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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.