Home / 20,312.52-28,031.58-11,360.40

Finding the Fourth Proportional to 20,312.52, 28,031.58 and 11,360.40

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Solution

The fourth proportional to 20,312.52, 28,031.58 and 11,360.40 is: 15,677.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,312.52 : 28,031.58 = 11,360.40 : x
  2. Step 2: Convert to fraction form
    20,312.52/28,031.58 = 11,360.40/x
  3. Step 3: Cross multiply
    20,312.52x = 28,031.58 × 11,360.40
  4. Step 4: Simplify right side
    20,312.52x = 318,449,961.43
  5. Step 5: Solve for x
    x = 318,449,961.43/20,312.52
  6. Step 6: Final answer
    x = 15,677.52

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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.