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Finding the Fourth Proportional to 15,070.72, 20,795.88 and 8,354.68

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Solution

The fourth proportional to 15,070.72, 20,795.88 and 8,354.68 is: 11,528.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,070.72 : 20,795.88 = 8,354.68 : x
  2. Step 2: Convert to fraction form
    15,070.72/20,795.88 = 8,354.68/x
  3. Step 3: Cross multiply
    15,070.72x = 20,795.88 × 8,354.68
  4. Step 4: Simplify right side
    15,070.72x = 173,742,922.72
  5. Step 5: Solve for x
    x = 173,742,922.72/15,070.72
  6. Step 6: Final answer
    x = 11,528.51

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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.