Home / 15,328.64-21,153.89-8,613.86

Finding the Fourth Proportional to 15,328.64, 21,153.89 and 8,613.86

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Solution

The fourth proportional to 15,328.64, 21,153.89 and 8,613.86 is: 11,887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,328.64 : 21,153.89 = 8,613.86 : x
  2. Step 2: Convert to fraction form
    15,328.64/21,153.89 = 8,613.86/x
  3. Step 3: Cross multiply
    15,328.64x = 21,153.89 × 8,613.86
  4. Step 4: Simplify right side
    15,328.64x = 182,216,646.92
  5. Step 5: Solve for x
    x = 182,216,646.92/15,328.64
  6. Step 6: Final answer
    x = 11,887.33

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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.