Home / 12,531.02-18,780.12-5,126.81

Finding the Fourth Proportional to 12,531.02, 18,780.12 and 5,126.81

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Solution

The fourth proportional to 12,531.02, 18,780.12 and 5,126.81 is: 7,683.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,531.02 : 18,780.12 = 5,126.81 : x
  2. Step 2: Convert to fraction form
    12,531.02/18,780.12 = 5,126.81/x
  3. Step 3: Cross multiply
    12,531.02x = 18,780.12 × 5,126.81
  4. Step 4: Simplify right side
    12,531.02x = 96,282,013.12
  5. Step 5: Solve for x
    x = 96,282,013.12/12,531.02
  6. Step 6: Final answer
    x = 7,683.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.