Home / 40,139.85-55,375.53-28,210.98

Finding the Fourth Proportional to 40,139.85, 55,375.53 and 28,210.98

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Solution

The fourth proportional to 40,139.85, 55,375.53 and 28,210.98 is: 38,918.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,139.85 : 55,375.53 = 28,210.98 : x
  2. Step 2: Convert to fraction form
    40,139.85/55,375.53 = 28,210.98/x
  3. Step 3: Cross multiply
    40,139.85x = 55,375.53 × 28,210.98
  4. Step 4: Simplify right side
    40,139.85x = 1,562,197,969.32
  5. Step 5: Solve for x
    x = 1,562,197,969.32/40,139.85
  6. Step 6: Final answer
    x = 38,918.88

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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.