Home / 34,420.82-47,489.36-20,987.18

Finding the Fourth Proportional to 34,420.82, 47,489.36 and 20,987.18

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Solution

The fourth proportional to 34,420.82, 47,489.36 and 20,987.18 is: 28,955.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,420.82 : 47,489.36 = 20,987.18 : x
  2. Step 2: Convert to fraction form
    34,420.82/47,489.36 = 20,987.18/x
  3. Step 3: Cross multiply
    34,420.82x = 47,489.36 × 20,987.18
  4. Step 4: Simplify right side
    34,420.82x = 996,667,746.40
  5. Step 5: Solve for x
    x = 996,667,746.40/34,420.82
  6. Step 6: Final answer
    x = 28,955.37

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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.