Home / 17,870.40-24,661.26-9,912.78

Finding the Fourth Proportional to 17,870.40, 24,661.26 and 9,912.78

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Solution

The fourth proportional to 17,870.40, 24,661.26 and 9,912.78 is: 13,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,870.40 : 24,661.26 = 9,912.78 : x
  2. Step 2: Convert to fraction form
    17,870.40/24,661.26 = 9,912.78/x
  3. Step 3: Cross multiply
    17,870.40x = 24,661.26 × 9,912.78
  4. Step 4: Simplify right side
    17,870.40x = 244,461,644.90
  5. Step 5: Solve for x
    x = 244,461,644.90/17,870.40
  6. Step 6: Final answer
    x = 13,679.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.