Home / 28,420.76-42,631.50-10,891.64

Finding the Fourth Proportional to 28,420.76, 42,631.50 and 10,891.64

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Solution

The fourth proportional to 28,420.76, 42,631.50 and 10,891.64 is: 16,337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.76 : 42,631.50 = 10,891.64 : x
  2. Step 2: Convert to fraction form
    28,420.76/42,631.50 = 10,891.64/x
  3. Step 3: Cross multiply
    28,420.76x = 42,631.50 × 10,891.64
  4. Step 4: Simplify right side
    28,420.76x = 464,326,950.66
  5. Step 5: Solve for x
    x = 464,326,950.66/28,420.76
  6. Step 6: Final answer
    x = 16,337.60

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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.