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Finding the Fourth Proportional to 30,491.78, 42,079.95 and 18,852.53

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Solution

The fourth proportional to 30,491.78, 42,079.95 and 18,852.53 is: 26,017.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,491.78 : 42,079.95 = 18,852.53 : x
  2. Step 2: Convert to fraction form
    30,491.78/42,079.95 = 18,852.53/x
  3. Step 3: Cross multiply
    30,491.78x = 42,079.95 × 18,852.53
  4. Step 4: Simplify right side
    30,491.78x = 793,313,309.37
  5. Step 5: Solve for x
    x = 793,313,309.37/30,491.78
  6. Step 6: Final answer
    x = 26,017.29

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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.