Home / 15,590.64-21,513.96-8,515.56

Finding the Fourth Proportional to 15,590.64, 21,513.96 and 8,515.56

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Solution

The fourth proportional to 15,590.64, 21,513.96 and 8,515.56 is: 11,750.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,590.64 : 21,513.96 = 8,515.56 : x
  2. Step 2: Convert to fraction form
    15,590.64/21,513.96 = 8,515.56/x
  3. Step 3: Cross multiply
    15,590.64x = 21,513.96 × 8,515.56
  4. Step 4: Simplify right side
    15,590.64x = 183,203,417.22
  5. Step 5: Solve for x
    x = 183,203,417.22/15,590.64
  6. Step 6: Final answer
    x = 11,750.86

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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.