Home / 13,125.65-18,113.49-7,157.19

Finding the Fourth Proportional to 13,125.65, 18,113.49 and 7,157.19

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Solution

The fourth proportional to 13,125.65, 18,113.49 and 7,157.19 is: 9,876.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.65 : 18,113.49 = 7,157.19 : x
  2. Step 2: Convert to fraction form
    13,125.65/18,113.49 = 7,157.19/x
  3. Step 3: Cross multiply
    13,125.65x = 18,113.49 × 7,157.19
  4. Step 4: Simplify right side
    13,125.65x = 129,641,574.39
  5. Step 5: Solve for x
    x = 129,641,574.39/13,125.65
  6. Step 6: Final answer
    x = 9,876.97

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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.