Home / 20,530.86-28,332.50-11,099.40

Finding the Fourth Proportional to 20,530.86, 28,332.50 and 11,099.40

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Solution

The fourth proportional to 20,530.86, 28,332.50 and 11,099.40 is: 15,317.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.86 : 28,332.50 = 11,099.40 : x
  2. Step 2: Convert to fraction form
    20,530.86/28,332.50 = 11,099.40/x
  3. Step 3: Cross multiply
    20,530.86x = 28,332.50 × 11,099.40
  4. Step 4: Simplify right side
    20,530.86x = 314,473,750.50
  5. Step 5: Solve for x
    x = 314,473,750.50/20,530.86
  6. Step 6: Final answer
    x = 15,317.13

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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.