Home / 15,385.87-21,232.47-8,312.26

Finding the Fourth Proportional to 15,385.87, 21,232.47 and 8,312.26

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Solution

The fourth proportional to 15,385.87, 21,232.47 and 8,312.26 is: 11,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.87 : 21,232.47 = 8,312.26 : x
  2. Step 2: Convert to fraction form
    15,385.87/21,232.47 = 8,312.26/x
  3. Step 3: Cross multiply
    15,385.87x = 21,232.47 × 8,312.26
  4. Step 4: Simplify right side
    15,385.87x = 176,489,811.08
  5. Step 5: Solve for x
    x = 176,489,811.08/15,385.87
  6. Step 6: Final answer
    x = 11,470.90

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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.