Home / 15,145.78-20,901.64-8,247.40

Finding the Fourth Proportional to 15,145.78, 20,901.64 and 8,247.40

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Solution

The fourth proportional to 15,145.78, 20,901.64 and 8,247.40 is: 11,381.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.78 : 20,901.64 = 8,247.40 : x
  2. Step 2: Convert to fraction form
    15,145.78/20,901.64 = 8,247.40/x
  3. Step 3: Cross multiply
    15,145.78x = 20,901.64 × 8,247.40
  4. Step 4: Simplify right side
    15,145.78x = 172,384,165.12
  5. Step 5: Solve for x
    x = 172,384,165.12/15,145.78
  6. Step 6: Final answer
    x = 11,381.66

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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.