Home / 40,135.34-55,386.15-21,985.92

Finding the Fourth Proportional to 40,135.34, 55,386.15 and 21,985.92

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Solution

The fourth proportional to 40,135.34, 55,386.15 and 21,985.92 is: 30,340.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,135.34 : 55,386.15 = 21,985.92 : x
  2. Step 2: Convert to fraction form
    40,135.34/55,386.15 = 21,985.92/x
  3. Step 3: Cross multiply
    40,135.34x = 55,386.15 × 21,985.92
  4. Step 4: Simplify right side
    40,135.34x = 1,217,715,463.01
  5. Step 5: Solve for x
    x = 1,217,715,463.01/40,135.34
  6. Step 6: Final answer
    x = 30,340.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.