Home / 21,125.60-31,662.80-9,426.40

Finding the Fourth Proportional to 21,125.60, 31,662.80 and 9,426.40

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Solution

The fourth proportional to 21,125.60, 31,662.80 and 9,426.40 is: 14,128.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.60 : 31,662.80 = 9,426.40 : x
  2. Step 2: Convert to fraction form
    21,125.60/31,662.80 = 9,426.40/x
  3. Step 3: Cross multiply
    21,125.60x = 31,662.80 × 9,426.40
  4. Step 4: Simplify right side
    21,125.60x = 298,466,217.92
  5. Step 5: Solve for x
    x = 298,466,217.92/21,125.60
  6. Step 6: Final answer
    x = 14,128.18

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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.