Home / 21,818.16-30,115.80-13,437.36

Finding the Fourth Proportional to 21,818.16, 30,115.80 and 13,437.36

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Solution

The fourth proportional to 21,818.16, 30,115.80 and 13,437.36 is: 18,547.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.16 : 30,115.80 = 13,437.36 : x
  2. Step 2: Convert to fraction form
    21,818.16/30,115.80 = 13,437.36/x
  3. Step 3: Cross multiply
    21,818.16x = 30,115.80 × 13,437.36
  4. Step 4: Simplify right side
    21,818.16x = 404,676,846.29
  5. Step 5: Solve for x
    x = 404,676,846.29/21,818.16
  6. Step 6: Final answer
    x = 18,547.71

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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.