Home / 21,084.40-31,627.14-9,988.48

Finding the Fourth Proportional to 21,084.40, 31,627.14 and 9,988.48

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Solution

The fourth proportional to 21,084.40, 31,627.14 and 9,988.48 is: 14,982.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.40 : 31,627.14 = 9,988.48 : x
  2. Step 2: Convert to fraction form
    21,084.40/31,627.14 = 9,988.48/x
  3. Step 3: Cross multiply
    21,084.40x = 31,627.14 × 9,988.48
  4. Step 4: Simplify right side
    21,084.40x = 315,907,055.35
  5. Step 5: Solve for x
    x = 315,907,055.35/21,084.40
  6. Step 6: Final answer
    x = 14,982.98

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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.