Home / 28,478.16-42,651.60-19,719.28

Finding the Fourth Proportional to 28,478.16, 42,651.60 and 19,719.28

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Solution

The fourth proportional to 28,478.16, 42,651.60 and 19,719.28 is: 29,533.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.16 : 42,651.60 = 19,719.28 : x
  2. Step 2: Convert to fraction form
    28,478.16/42,651.60 = 19,719.28/x
  3. Step 3: Cross multiply
    28,478.16x = 42,651.60 × 19,719.28
  4. Step 4: Simplify right side
    28,478.16x = 841,058,842.85
  5. Step 5: Solve for x
    x = 841,058,842.85/28,478.16
  6. Step 6: Final answer
    x = 29,533.47

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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.