Home / 20,603.84-28,433.46-11,172.40

Finding the Fourth Proportional to 20,603.84, 28,433.46 and 11,172.40

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Solution

The fourth proportional to 20,603.84, 28,433.46 and 11,172.40 is: 15,418.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,603.84 : 28,433.46 = 11,172.40 : x
  2. Step 2: Convert to fraction form
    20,603.84/28,433.46 = 11,172.40/x
  3. Step 3: Cross multiply
    20,603.84x = 28,433.46 × 11,172.40
  4. Step 4: Simplify right side
    20,603.84x = 317,669,988.50
  5. Step 5: Solve for x
    x = 317,669,988.50/20,603.84
  6. Step 6: Final answer
    x = 15,418.00

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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.