Home / 21,203.28-31,854.12-12,444.40

Finding the Fourth Proportional to 21,203.28, 31,854.12 and 12,444.40

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Solution

The fourth proportional to 21,203.28, 31,854.12 and 12,444.40 is: 18,695.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.28 : 31,854.12 = 12,444.40 : x
  2. Step 2: Convert to fraction form
    21,203.28/31,854.12 = 12,444.40/x
  3. Step 3: Cross multiply
    21,203.28x = 31,854.12 × 12,444.40
  4. Step 4: Simplify right side
    21,203.28x = 396,405,410.93
  5. Step 5: Solve for x
    x = 396,405,410.93/21,203.28
  6. Step 6: Final answer
    x = 18,695.48

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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.