Home / 31,421.60-43,361.16-18,850.40

Finding the Fourth Proportional to 31,421.60, 43,361.16 and 18,850.40

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Solution

The fourth proportional to 31,421.60, 43,361.16 and 18,850.40 is: 26,013.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,421.60 : 43,361.16 = 18,850.40 : x
  2. Step 2: Convert to fraction form
    31,421.60/43,361.16 = 18,850.40/x
  3. Step 3: Cross multiply
    31,421.60x = 43,361.16 × 18,850.40
  4. Step 4: Simplify right side
    31,421.60x = 817,375,210.46
  5. Step 5: Solve for x
    x = 817,375,210.46/31,421.60
  6. Step 6: Final answer
    x = 26,013.16

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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.