Home / 39,111.20-58,666.80-12,818.60

Finding the Fourth Proportional to 39,111.20, 58,666.80 and 12,818.60

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Solution

The fourth proportional to 39,111.20, 58,666.80 and 12,818.60 is: 19,227.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,111.20 : 58,666.80 = 12,818.60 : x
  2. Step 2: Convert to fraction form
    39,111.20/58,666.80 = 12,818.60/x
  3. Step 3: Cross multiply
    39,111.20x = 58,666.80 × 12,818.60
  4. Step 4: Simplify right side
    39,111.20x = 752,026,242.48
  5. Step 5: Solve for x
    x = 752,026,242.48/39,111.20
  6. Step 6: Final answer
    x = 19,227.90

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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.