Home / 21,081.60-31,596.80-9,382.40

Finding the Fourth Proportional to 21,081.60, 31,596.80 and 9,382.40

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Solution

The fourth proportional to 21,081.60, 31,596.80 and 9,382.40 is: 14,062.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,081.60 : 31,596.80 = 9,382.40 : x
  2. Step 2: Convert to fraction form
    21,081.60/31,596.80 = 9,382.40/x
  3. Step 3: Cross multiply
    21,081.60x = 31,596.80 × 9,382.40
  4. Step 4: Simplify right side
    21,081.60x = 296,453,816.32
  5. Step 5: Solve for x
    x = 296,453,816.32/21,081.60
  6. Step 6: Final answer
    x = 14,062.21

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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.