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Finding the Fourth Proportional to 19,263.38, 28,899.95 and 5,412.38

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Solution

The fourth proportional to 19,263.38, 28,899.95 and 5,412.38 is: 8,119.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,263.38 : 28,899.95 = 5,412.38 : x
  2. Step 2: Convert to fraction form
    19,263.38/28,899.95 = 5,412.38/x
  3. Step 3: Cross multiply
    19,263.38x = 28,899.95 × 5,412.38
  4. Step 4: Simplify right side
    19,263.38x = 156,417,339.82
  5. Step 5: Solve for x
    x = 156,417,339.82/19,263.38
  6. Step 6: Final answer
    x = 8,119.93

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1.5x scale

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.