Home / 40,805.28-61,214.04-12,728.16

Finding the Fourth Proportional to 40,805.28, 61,214.04 and 12,728.16

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Solution

The fourth proportional to 40,805.28, 61,214.04 and 12,728.16 is: 19,094.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,805.28 : 61,214.04 = 12,728.16 : x
  2. Step 2: Convert to fraction form
    40,805.28/61,214.04 = 12,728.16/x
  3. Step 3: Cross multiply
    40,805.28x = 61,214.04 × 12,728.16
  4. Step 4: Simplify right side
    40,805.28x = 779,142,095.37
  5. Step 5: Solve for x
    x = 779,142,095.37/40,805.28
  6. Step 6: Final answer
    x = 19,094.15

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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.