Home / 15,557.20-21,462.16-9,888.90

Finding the Fourth Proportional to 15,557.20, 21,462.16 and 9,888.90

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Solution

The fourth proportional to 15,557.20, 21,462.16 and 9,888.90 is: 13,642.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,557.20 : 21,462.16 = 9,888.90 : x
  2. Step 2: Convert to fraction form
    15,557.20/21,462.16 = 9,888.90/x
  3. Step 3: Cross multiply
    15,557.20x = 21,462.16 × 9,888.90
  4. Step 4: Simplify right side
    15,557.20x = 212,237,154.02
  5. Step 5: Solve for x
    x = 212,237,154.02/15,557.20
  6. Step 6: Final answer
    x = 13,642.37

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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.