Home / 12,915.30-19,340.55-8,508.90

Finding the Fourth Proportional to 12,915.30, 19,340.55 and 8,508.90

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Solution

The fourth proportional to 12,915.30, 19,340.55 and 8,508.90 is: 12,742.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.30 : 19,340.55 = 8,508.90 : x
  2. Step 2: Convert to fraction form
    12,915.30/19,340.55 = 8,508.90/x
  3. Step 3: Cross multiply
    12,915.30x = 19,340.55 × 8,508.90
  4. Step 4: Simplify right side
    12,915.30x = 164,566,805.90
  5. Step 5: Solve for x
    x = 164,566,805.90/12,915.30
  6. Step 6: Final answer
    x = 12,742.00

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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.