Home / 15,807.18-21,814.32-8,637.39

Finding the Fourth Proportional to 15,807.18, 21,814.32 and 8,637.39

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Solution

The fourth proportional to 15,807.18, 21,814.32 and 8,637.39 is: 11,919.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,807.18 : 21,814.32 = 8,637.39 : x
  2. Step 2: Convert to fraction form
    15,807.18/21,814.32 = 8,637.39/x
  3. Step 3: Cross multiply
    15,807.18x = 21,814.32 × 8,637.39
  4. Step 4: Simplify right side
    15,807.18x = 188,418,789.42
  5. Step 5: Solve for x
    x = 188,418,789.42/15,807.18
  6. Step 6: Final answer
    x = 11,919.82

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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.