Home / 39,138.32-58,707-18,347.12

Finding the Fourth Proportional to 39,138.32, 58,707 and 18,347.12

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Solution

The fourth proportional to 39,138.32, 58,707 and 18,347.12 is: 27,520.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.32 : 58,707 = 18,347.12 : x
  2. Step 2: Convert to fraction form
    39,138.32/58,707 = 18,347.12/x
  3. Step 3: Cross multiply
    39,138.32x = 58,707 × 18,347.12
  4. Step 4: Simplify right side
    39,138.32x = 1,077,104,373.84
  5. Step 5: Solve for x
    x = 1,077,104,373.84/39,138.32
  6. Step 6: Final answer
    x = 27,520.45

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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.