Home / 31,395.40-43,337.02-20,788.45

Finding the Fourth Proportional to 31,395.40, 43,337.02 and 20,788.45

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Solution

The fourth proportional to 31,395.40, 43,337.02 and 20,788.45 is: 28,695.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,395.40 : 43,337.02 = 20,788.45 : x
  2. Step 2: Convert to fraction form
    31,395.40/43,337.02 = 20,788.45/x
  3. Step 3: Cross multiply
    31,395.40x = 43,337.02 × 20,788.45
  4. Step 4: Simplify right side
    31,395.40x = 900,909,473.42
  5. Step 5: Solve for x
    x = 900,909,473.42/31,395.40
  6. Step 6: Final answer
    x = 28,695.59

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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.