Home / 20,817.19-31,225.79-12,047.32

Finding the Fourth Proportional to 20,817.19, 31,225.79 and 12,047.32

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Solution

The fourth proportional to 20,817.19, 31,225.79 and 12,047.32 is: 18,070.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.19 : 31,225.79 = 12,047.32 : x
  2. Step 2: Convert to fraction form
    20,817.19/31,225.79 = 12,047.32/x
  3. Step 3: Cross multiply
    20,817.19x = 31,225.79 × 12,047.32
  4. Step 4: Simplify right side
    20,817.19x = 376,187,084.38
  5. Step 5: Solve for x
    x = 376,187,084.38/20,817.19
  6. Step 6: Final answer
    x = 18,070.98

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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.