Home / 20,603.48-28,432.80-11,172.08

Finding the Fourth Proportional to 20,603.48, 28,432.80 and 11,172.08

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Solution

The fourth proportional to 20,603.48, 28,432.80 and 11,172.08 is: 15,417.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.48 : 28,432.80 = 11,172.08 : x
  2. Step 2: Convert to fraction form
    20,603.48/28,432.80 = 11,172.08/x
  3. Step 3: Cross multiply
    20,603.48x = 28,432.80 × 11,172.08
  4. Step 4: Simplify right side
    20,603.48x = 317,653,516.22
  5. Step 5: Solve for x
    x = 317,653,516.22/20,603.48
  6. Step 6: Final answer
    x = 15,417.47

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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.