Home / 15,785.78-21,779.28-10,481.64

Finding the Fourth Proportional to 15,785.78, 21,779.28 and 10,481.64

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Solution

The fourth proportional to 15,785.78, 21,779.28 and 10,481.64 is: 14,461.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.78 : 21,779.28 = 10,481.64 : x
  2. Step 2: Convert to fraction form
    15,785.78/21,779.28 = 10,481.64/x
  3. Step 3: Cross multiply
    15,785.78x = 21,779.28 × 10,481.64
  4. Step 4: Simplify right side
    15,785.78x = 228,282,572.42
  5. Step 5: Solve for x
    x = 228,282,572.42/15,785.78
  6. Step 6: Final answer
    x = 14,461.28

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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.