Home / 15,528.65-21,429.36-8,455.05

Finding the Fourth Proportional to 15,528.65, 21,429.36 and 8,455.05

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Solution

The fourth proportional to 15,528.65, 21,429.36 and 8,455.05 is: 11,667.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.65 : 21,429.36 = 8,455.05 : x
  2. Step 2: Convert to fraction form
    15,528.65/21,429.36 = 8,455.05/x
  3. Step 3: Cross multiply
    15,528.65x = 21,429.36 × 8,455.05
  4. Step 4: Simplify right side
    15,528.65x = 181,186,310.27
  5. Step 5: Solve for x
    x = 181,186,310.27/15,528.65
  6. Step 6: Final answer
    x = 11,667.88

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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.