Home / 27,762.78-38,312.65-15,665.83

Finding the Fourth Proportional to 27,762.78, 38,312.65 and 15,665.83

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Solution

The fourth proportional to 27,762.78, 38,312.65 and 15,665.83 is: 21,618.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,762.78 : 38,312.65 = 15,665.83 : x
  2. Step 2: Convert to fraction form
    27,762.78/38,312.65 = 15,665.83/x
  3. Step 3: Cross multiply
    27,762.78x = 38,312.65 × 15,665.83
  4. Step 4: Simplify right side
    27,762.78x = 600,199,585.84
  5. Step 5: Solve for x
    x = 600,199,585.84/27,762.78
  6. Step 6: Final answer
    x = 21,618.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.