Home / 20,530.91-28,332.65-11,099.47

Finding the Fourth Proportional to 20,530.91, 28,332.65 and 11,099.47

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Solution

The fourth proportional to 20,530.91, 28,332.65 and 11,099.47 is: 15,317.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.91 : 28,332.65 = 11,099.47 : x
  2. Step 2: Convert to fraction form
    20,530.91/28,332.65 = 11,099.47/x
  3. Step 3: Cross multiply
    20,530.91x = 28,332.65 × 11,099.47
  4. Step 4: Simplify right side
    20,530.91x = 314,477,398.70
  5. Step 5: Solve for x
    x = 314,477,398.70/20,530.91
  6. Step 6: Final answer
    x = 15,317.27

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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.