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Finding the Fourth Proportional to 26,423.80, 39,587.70 and 20,913.40

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Solution

The fourth proportional to 26,423.80, 39,587.70 and 20,913.40 is: 31,332.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,423.80 : 39,587.70 = 20,913.40 : x
  2. Step 2: Convert to fraction form
    26,423.80/39,587.70 = 20,913.40/x
  3. Step 3: Cross multiply
    26,423.80x = 39,587.70 × 20,913.40
  4. Step 4: Simplify right side
    26,423.80x = 827,913,405.18
  5. Step 5: Solve for x
    x = 827,913,405.18/26,423.80
  6. Step 6: Final answer
    x = 31,332.11

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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.