Home / 21,128.59-31,690.41-5,547.43

Finding the Fourth Proportional to 21,128.59, 31,690.41 and 5,547.43

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Solution

The fourth proportional to 21,128.59, 31,690.41 and 5,547.43 is: 8,320.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.59 : 31,690.41 = 5,547.43 : x
  2. Step 2: Convert to fraction form
    21,128.59/31,690.41 = 5,547.43/x
  3. Step 3: Cross multiply
    21,128.59x = 31,690.41 × 5,547.43
  4. Step 4: Simplify right side
    21,128.59x = 175,800,331.15
  5. Step 5: Solve for x
    x = 175,800,331.15/21,128.59
  6. Step 6: Final answer
    x = 8,320.50

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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.