Home / 18,977.12-28,465.60-10,657.20

Finding the Fourth Proportional to 18,977.12, 28,465.60 and 10,657.20

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Solution

The fourth proportional to 18,977.12, 28,465.60 and 10,657.20 is: 15,985.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.12 : 28,465.60 = 10,657.20 : x
  2. Step 2: Convert to fraction form
    18,977.12/28,465.60 = 10,657.20/x
  3. Step 3: Cross multiply
    18,977.12x = 28,465.60 × 10,657.20
  4. Step 4: Simplify right side
    18,977.12x = 303,363,592.32
  5. Step 5: Solve for x
    x = 303,363,592.32/18,977.12
  6. Step 6: Final answer
    x = 15,985.76

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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.