Home / 15,558.20-21,463.54-9,889.90

Finding the Fourth Proportional to 15,558.20, 21,463.54 and 9,889.90

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Solution

The fourth proportional to 15,558.20, 21,463.54 and 9,889.90 is: 13,643.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,558.20 : 21,463.54 = 9,889.90 : x
  2. Step 2: Convert to fraction form
    15,558.20/21,463.54 = 9,889.90/x
  3. Step 3: Cross multiply
    15,558.20x = 21,463.54 × 9,889.90
  4. Step 4: Simplify right side
    15,558.20x = 212,272,264.25
  5. Step 5: Solve for x
    x = 212,272,264.25/15,558.20
  6. Step 6: Final answer
    x = 13,643.75

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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.