Home / 13,545.08-18,690.18-7,955

Finding the Fourth Proportional to 13,545.08, 18,690.18 and 7,955

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Solution

The fourth proportional to 13,545.08, 18,690.18 and 7,955 is: 10,976.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.08 : 18,690.18 = 7,955 : x
  2. Step 2: Convert to fraction form
    13,545.08/18,690.18 = 7,955/x
  3. Step 3: Cross multiply
    13,545.08x = 18,690.18 × 7,955
  4. Step 4: Simplify right side
    13,545.08x = 148,680,381.90
  5. Step 5: Solve for x
    x = 148,680,381.90/13,545.08
  6. Step 6: Final answer
    x = 10,976.71

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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.