Home / 21,070.90-31,608.16-5,488.50

Finding the Fourth Proportional to 21,070.90, 31,608.16 and 5,488.50

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Solution

The fourth proportional to 21,070.90, 31,608.16 and 5,488.50 is: 8,233.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.90 : 31,608.16 = 5,488.50 : x
  2. Step 2: Convert to fraction form
    21,070.90/31,608.16 = 5,488.50/x
  3. Step 3: Cross multiply
    21,070.90x = 31,608.16 × 5,488.50
  4. Step 4: Simplify right side
    21,070.90x = 173,481,386.16
  5. Step 5: Solve for x
    x = 173,481,386.16/21,070.90
  6. Step 6: Final answer
    x = 8,233.22

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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.