Home / 21,031.32-31,546.29-8,547.66

Finding the Fourth Proportional to 21,031.32, 31,546.29 and 8,547.66

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Solution

The fourth proportional to 21,031.32, 31,546.29 and 8,547.66 is: 12,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.32 : 31,546.29 = 8,547.66 : x
  2. Step 2: Convert to fraction form
    21,031.32/31,546.29 = 8,547.66/x
  3. Step 3: Cross multiply
    21,031.32x = 31,546.29 × 8,547.66
  4. Step 4: Simplify right side
    21,031.32x = 269,646,961.18
  5. Step 5: Solve for x
    x = 269,646,961.18/21,031.32
  6. Step 6: Final answer
    x = 12,821.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.