Home / 31,479.48-43,348.08-30,781.08

Finding the Fourth Proportional to 31,479.48, 43,348.08 and 30,781.08

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Solution

The fourth proportional to 31,479.48, 43,348.08 and 30,781.08 is: 42,386.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,479.48 : 43,348.08 = 30,781.08 : x
  2. Step 2: Convert to fraction form
    31,479.48/43,348.08 = 30,781.08/x
  3. Step 3: Cross multiply
    31,479.48x = 43,348.08 × 30,781.08
  4. Step 4: Simplify right side
    31,479.48x = 1,334,300,718.33
  5. Step 5: Solve for x
    x = 1,334,300,718.33/31,479.48
  6. Step 6: Final answer
    x = 42,386.36

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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.