Home / 30,448.53-42,031.92-18,515.70

Finding the Fourth Proportional to 30,448.53, 42,031.92 and 18,515.70

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Solution

The fourth proportional to 30,448.53, 42,031.92 and 18,515.70 is: 25,559.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,448.53 : 42,031.92 = 18,515.70 : x
  2. Step 2: Convert to fraction form
    30,448.53/42,031.92 = 18,515.70/x
  3. Step 3: Cross multiply
    30,448.53x = 42,031.92 × 18,515.70
  4. Step 4: Simplify right side
    30,448.53x = 778,250,421.14
  5. Step 5: Solve for x
    x = 778,250,421.14/30,448.53
  6. Step 6: Final answer
    x = 25,559.54

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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.