Home / 20,530.08-28,336.05-13,347.50

Finding the Fourth Proportional to 20,530.08, 28,336.05 and 13,347.50

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Solution

The fourth proportional to 20,530.08, 28,336.05 and 13,347.50 is: 18,422.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.08 : 28,336.05 = 13,347.50 : x
  2. Step 2: Convert to fraction form
    20,530.08/28,336.05 = 13,347.50/x
  3. Step 3: Cross multiply
    20,530.08x = 28,336.05 × 13,347.50
  4. Step 4: Simplify right side
    20,530.08x = 378,215,218.96
  5. Step 5: Solve for x
    x = 378,215,218.96/20,530.08
  6. Step 6: Final answer
    x = 18,422.49

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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.