Home / 40,728.36-61,089.30-12,647.28

Finding the Fourth Proportional to 40,728.36, 61,089.30 and 12,647.28

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Solution

The fourth proportional to 40,728.36, 61,089.30 and 12,647.28 is: 18,969.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.36 : 61,089.30 = 12,647.28 : x
  2. Step 2: Convert to fraction form
    40,728.36/61,089.30 = 12,647.28/x
  3. Step 3: Cross multiply
    40,728.36x = 61,089.30 × 12,647.28
  4. Step 4: Simplify right side
    40,728.36x = 772,613,482.10
  5. Step 5: Solve for x
    x = 772,613,482.10/40,728.36
  6. Step 6: Final answer
    x = 18,969.91

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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.