Home / 15,870.56-21,877.12-12,507.36

Finding the Fourth Proportional to 15,870.56, 21,877.12 and 12,507.36

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Solution

The fourth proportional to 15,870.56, 21,877.12 and 12,507.36 is: 17,241.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,870.56 : 21,877.12 = 12,507.36 : x
  2. Step 2: Convert to fraction form
    15,870.56/21,877.12 = 12,507.36/x
  3. Step 3: Cross multiply
    15,870.56x = 21,877.12 × 12,507.36
  4. Step 4: Simplify right side
    15,870.56x = 273,625,015.60
  5. Step 5: Solve for x
    x = 273,625,015.60/15,870.56
  6. Step 6: Final answer
    x = 17,241.04

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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.