Home / 21,087.56-31,630.62-9,999.56

Finding the Fourth Proportional to 21,087.56, 31,630.62 and 9,999.56

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Solution

The fourth proportional to 21,087.56, 31,630.62 and 9,999.56 is: 14,999.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,087.56 : 31,630.62 = 9,999.56 : x
  2. Step 2: Convert to fraction form
    21,087.56/31,630.62 = 9,999.56/x
  3. Step 3: Cross multiply
    21,087.56x = 31,630.62 × 9,999.56
  4. Step 4: Simplify right side
    21,087.56x = 316,292,282.53
  5. Step 5: Solve for x
    x = 316,292,282.53/21,087.56
  6. Step 6: Final answer
    x = 14,999.00

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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.