Home / 20,686.32-28,548.48-11,730.72

Finding the Fourth Proportional to 20,686.32, 28,548.48 and 11,730.72

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Solution

The fourth proportional to 20,686.32, 28,548.48 and 11,730.72 is: 16,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.32 : 28,548.48 = 11,730.72 : x
  2. Step 2: Convert to fraction form
    20,686.32/28,548.48 = 11,730.72/x
  3. Step 3: Cross multiply
    20,686.32x = 28,548.48 × 11,730.72
  4. Step 4: Simplify right side
    20,686.32x = 334,894,225.31
  5. Step 5: Solve for x
    x = 334,894,225.31/20,686.32
  6. Step 6: Final answer
    x = 16,189.16

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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.