Home / 19,306.89-28,960.63-7,620

Finding the Fourth Proportional to 19,306.89, 28,960.63 and 7,620

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Solution

The fourth proportional to 19,306.89, 28,960.63 and 7,620 is: 11,430.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,306.89 : 28,960.63 = 7,620 : x
  2. Step 2: Convert to fraction form
    19,306.89/28,960.63 = 7,620/x
  3. Step 3: Cross multiply
    19,306.89x = 28,960.63 × 7,620
  4. Step 4: Simplify right side
    19,306.89x = 220,679,981.55
  5. Step 5: Solve for x
    x = 220,679,981.55/19,306.89
  6. Step 6: Final answer
    x = 11,430.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.