Home / 13,870.81-19,122.51-9,387.46

Finding the Fourth Proportional to 13,870.81, 19,122.51 and 9,387.46

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Solution

The fourth proportional to 13,870.81, 19,122.51 and 9,387.46 is: 12,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,870.81 : 19,122.51 = 9,387.46 : x
  2. Step 2: Convert to fraction form
    13,870.81/19,122.51 = 9,387.46/x
  3. Step 3: Cross multiply
    13,870.81x = 19,122.51 × 9,387.46
  4. Step 4: Simplify right side
    13,870.81x = 179,511,797.72
  5. Step 5: Solve for x
    x = 179,511,797.72/13,870.81
  6. Step 6: Final answer
    x = 12,941.70

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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.