Home / 21,002.28-31,499.08-9,904.20

Finding the Fourth Proportional to 21,002.28, 31,499.08 and 9,904.20

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Solution

The fourth proportional to 21,002.28, 31,499.08 and 9,904.20 is: 14,854.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.28 : 31,499.08 = 9,904.20 : x
  2. Step 2: Convert to fraction form
    21,002.28/31,499.08 = 9,904.20/x
  3. Step 3: Cross multiply
    21,002.28x = 31,499.08 × 9,904.20
  4. Step 4: Simplify right side
    21,002.28x = 311,973,188.14
  5. Step 5: Solve for x
    x = 311,973,188.14/21,002.28
  6. Step 6: Final answer
    x = 14,854.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.