Home / 20,600.18-28,428-11,168.63

Finding the Fourth Proportional to 20,600.18, 28,428 and 11,168.63

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Solution

The fourth proportional to 20,600.18, 28,428 and 11,168.63 is: 15,412.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.18 : 28,428 = 11,168.63 : x
  2. Step 2: Convert to fraction form
    20,600.18/28,428 = 11,168.63/x
  3. Step 3: Cross multiply
    20,600.18x = 28,428 × 11,168.63
  4. Step 4: Simplify right side
    20,600.18x = 317,501,813.64
  5. Step 5: Solve for x
    x = 317,501,813.64/20,600.18
  6. Step 6: Final answer
    x = 15,412.57

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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.