Home / 15,691.22-21,649.65-9,312.51

Finding the Fourth Proportional to 15,691.22, 21,649.65 and 9,312.51

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Solution

The fourth proportional to 15,691.22, 21,649.65 and 9,312.51 is: 12,848.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.22 : 21,649.65 = 9,312.51 : x
  2. Step 2: Convert to fraction form
    15,691.22/21,649.65 = 9,312.51/x
  3. Step 3: Cross multiply
    15,691.22x = 21,649.65 × 9,312.51
  4. Step 4: Simplify right side
    15,691.22x = 201,612,582.12
  5. Step 5: Solve for x
    x = 201,612,582.12/15,691.22
  6. Step 6: Final answer
    x = 12,848.76

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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.