Home / 13,124.77-18,111.85-7,156.55

Finding the Fourth Proportional to 13,124.77, 18,111.85 and 7,156.55

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Solution

The fourth proportional to 13,124.77, 18,111.85 and 7,156.55 is: 9,875.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.77 : 18,111.85 = 7,156.55 : x
  2. Step 2: Convert to fraction form
    13,124.77/18,111.85 = 7,156.55/x
  3. Step 3: Cross multiply
    13,124.77x = 18,111.85 × 7,156.55
  4. Step 4: Simplify right side
    13,124.77x = 129,618,324.33
  5. Step 5: Solve for x
    x = 129,618,324.33/13,124.77
  6. Step 6: Final answer
    x = 9,875.86

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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.