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Finding the Fourth Proportional to 30,580.70, 42,201.79 and 18,479.52

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Solution

The fourth proportional to 30,580.70, 42,201.79 and 18,479.52 is: 25,501.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,580.70 : 42,201.79 = 18,479.52 : x
  2. Step 2: Convert to fraction form
    30,580.70/42,201.79 = 18,479.52/x
  3. Step 3: Cross multiply
    30,580.70x = 42,201.79 × 18,479.52
  4. Step 4: Simplify right side
    30,580.70x = 779,868,822.34
  5. Step 5: Solve for x
    x = 779,868,822.34/30,580.70
  6. Step 6: Final answer
    x = 25,501.99

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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.