Home / 30,515.04-42,098.40-18,568.80

Finding the Fourth Proportional to 30,515.04, 42,098.40 and 18,568.80

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Solution

The fourth proportional to 30,515.04, 42,098.40 and 18,568.80 is: 25,617.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,515.04 : 42,098.40 = 18,568.80 : x
  2. Step 2: Convert to fraction form
    30,515.04/42,098.40 = 18,568.80/x
  3. Step 3: Cross multiply
    30,515.04x = 42,098.40 × 18,568.80
  4. Step 4: Simplify right side
    30,515.04x = 781,716,769.92
  5. Step 5: Solve for x
    x = 781,716,769.92/30,515.04
  6. Step 6: Final answer
    x = 25,617.43

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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.