Home / 21,279.18-31,918.19-6,487.50

Finding the Fourth Proportional to 21,279.18, 31,918.19 and 6,487.50

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Solution

The fourth proportional to 21,279.18, 31,918.19 and 6,487.50 is: 9,731.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.18 : 31,918.19 = 6,487.50 : x
  2. Step 2: Convert to fraction form
    21,279.18/31,918.19 = 6,487.50/x
  3. Step 3: Cross multiply
    21,279.18x = 31,918.19 × 6,487.50
  4. Step 4: Simplify right side
    21,279.18x = 207,069,225.19
  5. Step 5: Solve for x
    x = 207,069,225.19/21,279.18
  6. Step 6: Final answer
    x = 9,731.07

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1.5x scale

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.