Home / 21,013.25-31,520.07-9,888.30

Finding the Fourth Proportional to 21,013.25, 31,520.07 and 9,888.30

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Solution

The fourth proportional to 21,013.25, 31,520.07 and 9,888.30 is: 14,832.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.25 : 31,520.07 = 9,888.30 : x
  2. Step 2: Convert to fraction form
    21,013.25/31,520.07 = 9,888.30/x
  3. Step 3: Cross multiply
    21,013.25x = 31,520.07 × 9,888.30
  4. Step 4: Simplify right side
    21,013.25x = 311,679,908.18
  5. Step 5: Solve for x
    x = 311,679,908.18/21,013.25
  6. Step 6: Final answer
    x = 14,832.55

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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.