Home / 15,507.65-21,405.40-8,797.75

Finding the Fourth Proportional to 15,507.65, 21,405.40 and 8,797.75

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Solution

The fourth proportional to 15,507.65, 21,405.40 and 8,797.75 is: 12,143.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,507.65 : 21,405.40 = 8,797.75 : x
  2. Step 2: Convert to fraction form
    15,507.65/21,405.40 = 8,797.75/x
  3. Step 3: Cross multiply
    15,507.65x = 21,405.40 × 8,797.75
  4. Step 4: Simplify right side
    15,507.65x = 188,319,282.34
  5. Step 5: Solve for x
    x = 188,319,282.34/15,507.65
  6. Step 6: Final answer
    x = 12,143.64

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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.