Home / 20,008.20-29,988.30-8,315.40

Finding the Fourth Proportional to 20,008.20, 29,988.30 and 8,315.40

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Solution

The fourth proportional to 20,008.20, 29,988.30 and 8,315.40 is: 12,463.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,008.20 : 29,988.30 = 8,315.40 : x
  2. Step 2: Convert to fraction form
    20,008.20/29,988.30 = 8,315.40/x
  3. Step 3: Cross multiply
    20,008.20x = 29,988.30 × 8,315.40
  4. Step 4: Simplify right side
    20,008.20x = 249,364,709.82
  5. Step 5: Solve for x
    x = 249,364,709.82/20,008.20
  6. Step 6: Final answer
    x = 12,463.13

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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.