Home / 20,913.39-28,859.50-11,353.07

Finding the Fourth Proportional to 20,913.39, 28,859.50 and 11,353.07

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Solution

The fourth proportional to 20,913.39, 28,859.50 and 11,353.07 is: 15,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.39 : 28,859.50 = 11,353.07 : x
  2. Step 2: Convert to fraction form
    20,913.39/28,859.50 = 11,353.07/x
  3. Step 3: Cross multiply
    20,913.39x = 28,859.50 × 11,353.07
  4. Step 4: Simplify right side
    20,913.39x = 327,643,823.13
  5. Step 5: Solve for x
    x = 327,643,823.13/20,913.39
  6. Step 6: Final answer
    x = 15,666.70

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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.