Home / 13,290.72-18,340.98-7,916.92

Finding the Fourth Proportional to 13,290.72, 18,340.98 and 7,916.92

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Solution

The fourth proportional to 13,290.72, 18,340.98 and 7,916.92 is: 10,925.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.72 : 18,340.98 = 7,916.92 : x
  2. Step 2: Convert to fraction form
    13,290.72/18,340.98 = 7,916.92/x
  3. Step 3: Cross multiply
    13,290.72x = 18,340.98 × 7,916.92
  4. Step 4: Simplify right side
    13,290.72x = 145,204,071.38
  5. Step 5: Solve for x
    x = 145,204,071.38/13,290.72
  6. Step 6: Final answer
    x = 10,925.22

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Double scale
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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.