Home / 30,947.60-42,708.20-16,800.45

Finding the Fourth Proportional to 30,947.60, 42,708.20 and 16,800.45

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Solution

The fourth proportional to 30,947.60, 42,708.20 and 16,800.45 is: 23,184.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,947.60 : 42,708.20 = 16,800.45 : x
  2. Step 2: Convert to fraction form
    30,947.60/42,708.20 = 16,800.45/x
  3. Step 3: Cross multiply
    30,947.60x = 42,708.20 × 16,800.45
  4. Step 4: Simplify right side
    30,947.60x = 717,516,734.53
  5. Step 5: Solve for x
    x = 717,516,734.53/30,947.60
  6. Step 6: Final answer
    x = 23,184.89

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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.