Home / 21,852.91-30,165.18-12,781.19

Finding the Fourth Proportional to 21,852.91, 30,165.18 and 12,781.19

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Solution

The fourth proportional to 21,852.91, 30,165.18 and 12,781.19 is: 17,642.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,852.91 : 30,165.18 = 12,781.19 : x
  2. Step 2: Convert to fraction form
    21,852.91/30,165.18 = 12,781.19/x
  3. Step 3: Cross multiply
    21,852.91x = 30,165.18 × 12,781.19
  4. Step 4: Simplify right side
    21,852.91x = 385,547,032.29
  5. Step 5: Solve for x
    x = 385,547,032.29/21,852.91
  6. Step 6: Final answer
    x = 17,642.82

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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.