Home / 20,603.45-28,432.67-11,172.02

Finding the Fourth Proportional to 20,603.45, 28,432.67 and 11,172.02

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Solution

The fourth proportional to 20,603.45, 28,432.67 and 11,172.02 is: 15,417.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.45 : 28,432.67 = 11,172.02 : x
  2. Step 2: Convert to fraction form
    20,603.45/28,432.67 = 11,172.02/x
  3. Step 3: Cross multiply
    20,603.45x = 28,432.67 × 11,172.02
  4. Step 4: Simplify right side
    20,603.45x = 317,650,159.87
  5. Step 5: Solve for x
    x = 317,650,159.87/20,603.45
  6. Step 6: Final answer
    x = 15,417.33

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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.