Home / 20,985.60-28,960.32-11,554.08

Finding the Fourth Proportional to 20,985.60, 28,960.32 and 11,554.08

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Solution

The fourth proportional to 20,985.60, 28,960.32 and 11,554.08 is: 15,944.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.60 : 28,960.32 = 11,554.08 : x
  2. Step 2: Convert to fraction form
    20,985.60/28,960.32 = 11,554.08/x
  3. Step 3: Cross multiply
    20,985.60x = 28,960.32 × 11,554.08
  4. Step 4: Simplify right side
    20,985.60x = 334,609,854.11
  5. Step 5: Solve for x
    x = 334,609,854.11/20,985.60
  6. Step 6: Final answer
    x = 15,944.74

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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.