Home / 15,431.04-21,295.44-10,121.76

Finding the Fourth Proportional to 15,431.04, 21,295.44 and 10,121.76

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Solution

The fourth proportional to 15,431.04, 21,295.44 and 10,121.76 is: 13,968.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.04 : 21,295.44 = 10,121.76 : x
  2. Step 2: Convert to fraction form
    15,431.04/21,295.44 = 10,121.76/x
  3. Step 3: Cross multiply
    15,431.04x = 21,295.44 × 10,121.76
  4. Step 4: Simplify right side
    15,431.04x = 215,547,332.77
  5. Step 5: Solve for x
    x = 215,547,332.77/15,431.04
  6. Step 6: Final answer
    x = 13,968.43

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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.