Home / 31,643.13-43,648.43-20,888.05

Finding the Fourth Proportional to 31,643.13, 43,648.43 and 20,888.05

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Solution

The fourth proportional to 31,643.13, 43,648.43 and 20,888.05 is: 28,812.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,643.13 : 43,648.43 = 20,888.05 : x
  2. Step 2: Convert to fraction form
    31,643.13/43,648.43 = 20,888.05/x
  3. Step 3: Cross multiply
    31,643.13x = 43,648.43 × 20,888.05
  4. Step 4: Simplify right side
    31,643.13x = 911,730,588.26
  5. Step 5: Solve for x
    x = 911,730,588.26/31,643.13
  6. Step 6: Final answer
    x = 28,812.91

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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.