Home / 20,603.50-28,432.83-11,172.07

Finding the Fourth Proportional to 20,603.50, 28,432.83 and 11,172.07

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Solution

The fourth proportional to 20,603.50, 28,432.83 and 11,172.07 is: 15,417.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.50 : 28,432.83 = 11,172.07 : x
  2. Step 2: Convert to fraction form
    20,603.50/28,432.83 = 11,172.07/x
  3. Step 3: Cross multiply
    20,603.50x = 28,432.83 × 11,172.07
  4. Step 4: Simplify right side
    20,603.50x = 317,653,567.06
  5. Step 5: Solve for x
    x = 317,653,567.06/20,603.50
  6. Step 6: Final answer
    x = 15,417.46

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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.