Home / 34,530.88-47,652.80-20,390.70

Finding the Fourth Proportional to 34,530.88, 47,652.80 and 20,390.70

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Solution

The fourth proportional to 34,530.88, 47,652.80 and 20,390.70 is: 28,139.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,530.88 : 47,652.80 = 20,390.70 : x
  2. Step 2: Convert to fraction form
    34,530.88/47,652.80 = 20,390.70/x
  3. Step 3: Cross multiply
    34,530.88x = 47,652.80 × 20,390.70
  4. Step 4: Simplify right side
    34,530.88x = 971,673,948.96
  5. Step 5: Solve for x
    x = 971,673,948.96/34,530.88
  6. Step 6: Final answer
    x = 28,139.28

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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.