Home / 18,988.72-28,457.30-10,535.29

Finding the Fourth Proportional to 18,988.72, 28,457.30 and 10,535.29

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Solution

The fourth proportional to 18,988.72, 28,457.30 and 10,535.29 is: 15,788.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.72 : 28,457.30 = 10,535.29 : x
  2. Step 2: Convert to fraction form
    18,988.72/28,457.30 = 10,535.29/x
  3. Step 3: Cross multiply
    18,988.72x = 28,457.30 × 10,535.29
  4. Step 4: Simplify right side
    18,988.72x = 299,805,863.31
  5. Step 5: Solve for x
    x = 299,805,863.31/18,988.72
  6. Step 6: Final answer
    x = 15,788.63

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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.