Home / 21,431.76-29,576.16-12,934.32

Finding the Fourth Proportional to 21,431.76, 29,576.16 and 12,934.32

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Solution

The fourth proportional to 21,431.76, 29,576.16 and 12,934.32 is: 17,849.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.76 : 29,576.16 = 12,934.32 : x
  2. Step 2: Convert to fraction form
    21,431.76/29,576.16 = 12,934.32/x
  3. Step 3: Cross multiply
    21,431.76x = 29,576.16 × 12,934.32
  4. Step 4: Simplify right side
    21,431.76x = 382,547,517.81
  5. Step 5: Solve for x
    x = 382,547,517.81/21,431.76
  6. Step 6: Final answer
    x = 17,849.56

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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.