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Finding the Fourth Proportional to 27,762.88, 38,312.72 and 15,187.64

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Solution

The fourth proportional to 27,762.88, 38,312.72 and 15,187.64 is: 20,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,762.88 : 38,312.72 = 15,187.64 : x
  2. Step 2: Convert to fraction form
    27,762.88/38,312.72 = 15,187.64/x
  3. Step 3: Cross multiply
    27,762.88x = 38,312.72 × 15,187.64
  4. Step 4: Simplify right side
    27,762.88x = 581,879,798.78
  5. Step 5: Solve for x
    x = 581,879,798.78/27,762.88
  6. Step 6: Final answer
    x = 20,958.91

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1.5x scale

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.