Home / 12,681.78-19,017.20-4,885.13

Finding the Fourth Proportional to 12,681.78, 19,017.20 and 4,885.13

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Solution

The fourth proportional to 12,681.78, 19,017.20 and 4,885.13 is: 7,325.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.78 : 19,017.20 = 4,885.13 : x
  2. Step 2: Convert to fraction form
    12,681.78/19,017.20 = 4,885.13/x
  3. Step 3: Cross multiply
    12,681.78x = 19,017.20 × 4,885.13
  4. Step 4: Simplify right side
    12,681.78x = 92,901,374.72
  5. Step 5: Solve for x
    x = 92,901,374.72/12,681.78
  6. Step 6: Final answer
    x = 7,325.58

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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.