Home / 31,407.90-43,346.59-18,661.19

Finding the Fourth Proportional to 31,407.90, 43,346.59 and 18,661.19

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Solution

The fourth proportional to 31,407.90, 43,346.59 and 18,661.19 is: 25,754.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,407.90 : 43,346.59 = 18,661.19 : x
  2. Step 2: Convert to fraction form
    31,407.90/43,346.59 = 18,661.19/x
  3. Step 3: Cross multiply
    31,407.90x = 43,346.59 × 18,661.19
  4. Step 4: Simplify right side
    31,407.90x = 808,898,735.11
  5. Step 5: Solve for x
    x = 808,898,735.11/31,407.90
  6. Step 6: Final answer
    x = 25,754.63

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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.