Home / 39,138.86-58,702.79-12,840.19

Finding the Fourth Proportional to 39,138.86, 58,702.79 and 12,840.19

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Solution

The fourth proportional to 39,138.86, 58,702.79 and 12,840.19 is: 19,258.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,138.86 : 58,702.79 = 12,840.19 : x
  2. Step 2: Convert to fraction form
    39,138.86/58,702.79 = 12,840.19/x
  3. Step 3: Cross multiply
    39,138.86x = 58,702.79 × 12,840.19
  4. Step 4: Simplify right side
    39,138.86x = 753,754,862.47
  5. Step 5: Solve for x
    x = 753,754,862.47/39,138.86
  6. Step 6: Final answer
    x = 19,258.48

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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.