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Finding the Fourth Proportional to 30,479.90, 42,039 and 26,237.93

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Solution

The fourth proportional to 30,479.90, 42,039 and 26,237.93 is: 36,188.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,479.90 : 42,039 = 26,237.93 : x
  2. Step 2: Convert to fraction form
    30,479.90/42,039 = 26,237.93/x
  3. Step 3: Cross multiply
    30,479.90x = 42,039 × 26,237.93
  4. Step 4: Simplify right side
    30,479.90x = 1,103,016,129.08
  5. Step 5: Solve for x
    x = 1,103,016,129.08/30,479.90
  6. Step 6: Final answer
    x = 36,188.32

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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.