Home / 28,440.64-42,663.20-9,729.60

Finding the Fourth Proportional to 28,440.64, 42,663.20 and 9,729.60

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Solution

The fourth proportional to 28,440.64, 42,663.20 and 9,729.60 is: 14,595.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,440.64 : 42,663.20 = 9,729.60 : x
  2. Step 2: Convert to fraction form
    28,440.64/42,663.20 = 9,729.60/x
  3. Step 3: Cross multiply
    28,440.64x = 42,663.20 × 9,729.60
  4. Step 4: Simplify right side
    28,440.64x = 415,095,870.72
  5. Step 5: Solve for x
    x = 415,095,870.72/28,440.64
  6. Step 6: Final answer
    x = 14,595.17

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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.