Home / 26,931.12-40,406.40-13,789.68

Finding the Fourth Proportional to 26,931.12, 40,406.40 and 13,789.68

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Solution

The fourth proportional to 26,931.12, 40,406.40 and 13,789.68 is: 20,689.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,931.12 : 40,406.40 = 13,789.68 : x
  2. Step 2: Convert to fraction form
    26,931.12/40,406.40 = 13,789.68/x
  3. Step 3: Cross multiply
    26,931.12x = 40,406.40 × 13,789.68
  4. Step 4: Simplify right side
    26,931.12x = 557,191,325.95
  5. Step 5: Solve for x
    x = 557,191,325.95/26,931.12
  6. Step 6: Final answer
    x = 20,689.50

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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.