Home / 30,515.95-42,098.02-18,421.03

Finding the Fourth Proportional to 30,515.95, 42,098.02 and 18,421.03

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Solution

The fourth proportional to 30,515.95, 42,098.02 and 18,421.03 is: 25,412.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,515.95 : 42,098.02 = 18,421.03 : x
  2. Step 2: Convert to fraction form
    30,515.95/42,098.02 = 18,421.03/x
  3. Step 3: Cross multiply
    30,515.95x = 42,098.02 × 18,421.03
  4. Step 4: Simplify right side
    30,515.95x = 775,488,889.36
  5. Step 5: Solve for x
    x = 775,488,889.36/30,515.95
  6. Step 6: Final answer
    x = 25,412.58

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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.