Home / 9,139.18-12,612-4,947.40

Finding the Fourth Proportional to 9,139.18, 12,612 and 4,947.40

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Solution

The fourth proportional to 9,139.18, 12,612 and 4,947.40 is: 6,827.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,139.18 : 12,612 = 4,947.40 : x
  2. Step 2: Convert to fraction form
    9,139.18/12,612 = 4,947.40/x
  3. Step 3: Cross multiply
    9,139.18x = 12,612 × 4,947.40
  4. Step 4: Simplify right side
    9,139.18x = 62,396,608.80
  5. Step 5: Solve for x
    x = 62,396,608.80/9,139.18
  6. Step 6: Final answer
    x = 6,827.37

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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.