Home / 34,357.68-47,405.40-20,928.72

Finding the Fourth Proportional to 34,357.68, 47,405.40 and 20,928.72

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Solution

The fourth proportional to 34,357.68, 47,405.40 and 20,928.72 is: 28,876.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,357.68 : 47,405.40 = 20,928.72 : x
  2. Step 2: Convert to fraction form
    34,357.68/47,405.40 = 20,928.72/x
  3. Step 3: Cross multiply
    34,357.68x = 47,405.40 × 20,928.72
  4. Step 4: Simplify right side
    34,357.68x = 992,134,343.09
  5. Step 5: Solve for x
    x = 992,134,343.09/34,357.68
  6. Step 6: Final answer
    x = 28,876.64

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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.