Home / 30,448.03-42,031.23-18,515.20

Finding the Fourth Proportional to 30,448.03, 42,031.23 and 18,515.20

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Solution

The fourth proportional to 30,448.03, 42,031.23 and 18,515.20 is: 25,558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,448.03 : 42,031.23 = 18,515.20 : x
  2. Step 2: Convert to fraction form
    30,448.03/42,031.23 = 18,515.20/x
  3. Step 3: Cross multiply
    30,448.03x = 42,031.23 × 18,515.20
  4. Step 4: Simplify right side
    30,448.03x = 778,216,629.70
  5. Step 5: Solve for x
    x = 778,216,629.70/30,448.03
  6. Step 6: Final answer
    x = 25,558.85

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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.