Home / 31,132.06-42,971.44-21,703.66

Finding the Fourth Proportional to 31,132.06, 42,971.44 and 21,703.66

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Solution

The fourth proportional to 31,132.06, 42,971.44 and 21,703.66 is: 29,957.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,132.06 : 42,971.44 = 21,703.66 : x
  2. Step 2: Convert to fraction form
    31,132.06/42,971.44 = 21,703.66/x
  3. Step 3: Cross multiply
    31,132.06x = 42,971.44 × 21,703.66
  4. Step 4: Simplify right side
    31,132.06x = 932,637,523.47
  5. Step 5: Solve for x
    x = 932,637,523.47/31,132.06
  6. Step 6: Final answer
    x = 29,957.46

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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.