Home / 15,742.03-21,709.02-12,151.25

Finding the Fourth Proportional to 15,742.03, 21,709.02 and 12,151.25

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Solution

The fourth proportional to 15,742.03, 21,709.02 and 12,151.25 is: 16,757.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,742.03 : 21,709.02 = 12,151.25 : x
  2. Step 2: Convert to fraction form
    15,742.03/21,709.02 = 12,151.25/x
  3. Step 3: Cross multiply
    15,742.03x = 21,709.02 × 12,151.25
  4. Step 4: Simplify right side
    15,742.03x = 263,791,729.28
  5. Step 5: Solve for x
    x = 263,791,729.28/15,742.03
  6. Step 6: Final answer
    x = 16,757.16

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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.