Home / 28,432.64-42,651.20-9,721.60

Finding the Fourth Proportional to 28,432.64, 42,651.20 and 9,721.60

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Solution

The fourth proportional to 28,432.64, 42,651.20 and 9,721.60 is: 14,583.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,432.64 : 42,651.20 = 9,721.60 : x
  2. Step 2: Convert to fraction form
    28,432.64/42,651.20 = 9,721.60/x
  3. Step 3: Cross multiply
    28,432.64x = 42,651.20 × 9,721.60
  4. Step 4: Simplify right side
    28,432.64x = 414,637,905.92
  5. Step 5: Solve for x
    x = 414,637,905.92/28,432.64
  6. Step 6: Final answer
    x = 14,583.17

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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.