Home / 39,405.85-54,400.13-30,433.21

Finding the Fourth Proportional to 39,405.85, 54,400.13 and 30,433.21

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Solution

The fourth proportional to 39,405.85, 54,400.13 and 30,433.21 is: 42,013.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,405.85 : 54,400.13 = 30,433.21 : x
  2. Step 2: Convert to fraction form
    39,405.85/54,400.13 = 30,433.21/x
  3. Step 3: Cross multiply
    39,405.85x = 54,400.13 × 30,433.21
  4. Step 4: Simplify right side
    39,405.85x = 1,655,570,580.32
  5. Step 5: Solve for x
    x = 1,655,570,580.32/39,405.85
  6. Step 6: Final answer
    x = 42,013.32

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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.