Home / 15,585.12-21,506.64-8,869.68

Finding the Fourth Proportional to 15,585.12, 21,506.64 and 8,869.68

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Solution

The fourth proportional to 15,585.12, 21,506.64 and 8,869.68 is: 12,239.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,585.12 : 21,506.64 = 8,869.68 : x
  2. Step 2: Convert to fraction form
    15,585.12/21,506.64 = 8,869.68/x
  3. Step 3: Cross multiply
    15,585.12x = 21,506.64 × 8,869.68
  4. Step 4: Simplify right side
    15,585.12x = 190,757,014.68
  5. Step 5: Solve for x
    x = 190,757,014.68/15,585.12
  6. Step 6: Final answer
    x = 12,239.69

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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.