Home / 47,721.06-65,833.47-30,719.21

Finding the Fourth Proportional to 47,721.06, 65,833.47 and 30,719.21

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Solution

The fourth proportional to 47,721.06, 65,833.47 and 30,719.21 is: 42,378.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,721.06 : 65,833.47 = 30,719.21 : x
  2. Step 2: Convert to fraction form
    47,721.06/65,833.47 = 30,719.21/x
  3. Step 3: Cross multiply
    47,721.06x = 65,833.47 × 30,719.21
  4. Step 4: Simplify right side
    47,721.06x = 2,022,351,860.79
  5. Step 5: Solve for x
    x = 2,022,351,860.79/47,721.06
  6. Step 6: Final answer
    x = 42,378.60

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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.