Home / 15,403.02-21,254.85-8,687.31

Finding the Fourth Proportional to 15,403.02, 21,254.85 and 8,687.31

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Solution

The fourth proportional to 15,403.02, 21,254.85 and 8,687.31 is: 11,987.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,403.02 : 21,254.85 = 8,687.31 : x
  2. Step 2: Convert to fraction form
    15,403.02/21,254.85 = 8,687.31/x
  3. Step 3: Cross multiply
    15,403.02x = 21,254.85 × 8,687.31
  4. Step 4: Simplify right side
    15,403.02x = 184,647,470.95
  5. Step 5: Solve for x
    x = 184,647,470.95/15,403.02
  6. Step 6: Final answer
    x = 11,987.74

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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.