Home / 31,318.16-43,220.40-18,740.48

Finding the Fourth Proportional to 31,318.16, 43,220.40 and 18,740.48

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Solution

The fourth proportional to 31,318.16, 43,220.40 and 18,740.48 is: 25,862.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.16 : 43,220.40 = 18,740.48 : x
  2. Step 2: Convert to fraction form
    31,318.16/43,220.40 = 18,740.48/x
  3. Step 3: Cross multiply
    31,318.16x = 43,220.40 × 18,740.48
  4. Step 4: Simplify right side
    31,318.16x = 809,971,041.79
  5. Step 5: Solve for x
    x = 809,971,041.79/31,318.16
  6. Step 6: Final answer
    x = 25,862.66

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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.