Home / 14,990.47-20,689.87-8,621.51

Finding the Fourth Proportional to 14,990.47, 20,689.87 and 8,621.51

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Solution

The fourth proportional to 14,990.47, 20,689.87 and 8,621.51 is: 11,899.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,990.47 : 20,689.87 = 8,621.51 : x
  2. Step 2: Convert to fraction form
    14,990.47/20,689.87 = 8,621.51/x
  3. Step 3: Cross multiply
    14,990.47x = 20,689.87 × 8,621.51
  4. Step 4: Simplify right side
    14,990.47x = 178,377,921.10
  5. Step 5: Solve for x
    x = 178,377,921.10/14,990.47
  6. Step 6: Final answer
    x = 11,899.42

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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.