Home / 28,657.20-42,985.80-16,964.40

Finding the Fourth Proportional to 28,657.20, 42,985.80 and 16,964.40

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Solution

The fourth proportional to 28,657.20, 42,985.80 and 16,964.40 is: 25,446.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,657.20 : 42,985.80 = 16,964.40 : x
  2. Step 2: Convert to fraction form
    28,657.20/42,985.80 = 16,964.40/x
  3. Step 3: Cross multiply
    28,657.20x = 42,985.80 × 16,964.40
  4. Step 4: Simplify right side
    28,657.20x = 729,228,305.52
  5. Step 5: Solve for x
    x = 729,228,305.52/28,657.20
  6. Step 6: Final answer
    x = 25,446.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.