Home / 13,144.95-18,140.10-7,176.75

Finding the Fourth Proportional to 13,144.95, 18,140.10 and 7,176.75

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Solution

The fourth proportional to 13,144.95, 18,140.10 and 7,176.75 is: 9,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.95 : 18,140.10 = 7,176.75 : x
  2. Step 2: Convert to fraction form
    13,144.95/18,140.10 = 7,176.75/x
  3. Step 3: Cross multiply
    13,144.95x = 18,140.10 × 7,176.75
  4. Step 4: Simplify right side
    13,144.95x = 130,186,962.68
  5. Step 5: Solve for x
    x = 130,186,962.68/13,144.95
  6. Step 6: Final answer
    x = 9,903.95

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Half scale
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Double scale
Find fourth proportional to 13,145.95, 18,141.48 and 7,177.75
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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.