Home / 34,278.72-47,320.56-21,720.48

Finding the Fourth Proportional to 34,278.72, 47,320.56 and 21,720.48

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Solution

The fourth proportional to 34,278.72, 47,320.56 and 21,720.48 is: 29,984.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,278.72 : 47,320.56 = 21,720.48 : x
  2. Step 2: Convert to fraction form
    34,278.72/47,320.56 = 21,720.48/x
  3. Step 3: Cross multiply
    34,278.72x = 47,320.56 × 21,720.48
  4. Step 4: Simplify right side
    34,278.72x = 1,027,825,277.07
  5. Step 5: Solve for x
    x = 1,027,825,277.07/34,278.72
  6. Step 6: Final answer
    x = 29,984.35

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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.