Home / 15,143.13-20,921.23-11,570.60

Finding the Fourth Proportional to 15,143.13, 20,921.23 and 11,570.60

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Solution

The fourth proportional to 15,143.13, 20,921.23 and 11,570.60 is: 15,985.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.13 : 20,921.23 = 11,570.60 : x
  2. Step 2: Convert to fraction form
    15,143.13/20,921.23 = 11,570.60/x
  3. Step 3: Cross multiply
    15,143.13x = 20,921.23 × 11,570.60
  4. Step 4: Simplify right side
    15,143.13x = 242,071,021.38
  5. Step 5: Solve for x
    x = 242,071,021.38/15,143.13
  6. Step 6: Final answer
    x = 15,985.53

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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.