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Finding the Fourth Proportional to 15,605.88, 23,403.93 and 5,215.20

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Solution

The fourth proportional to 15,605.88, 23,403.93 and 5,215.20 is: 7,821.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.88 : 23,403.93 = 5,215.20 : x
  2. Step 2: Convert to fraction form
    15,605.88/23,403.93 = 5,215.20/x
  3. Step 3: Cross multiply
    15,605.88x = 23,403.93 × 5,215.20
  4. Step 4: Simplify right side
    15,605.88x = 122,056,175.74
  5. Step 5: Solve for x
    x = 122,056,175.74/15,605.88
  6. Step 6: Final answer
    x = 7,821.17

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1.5x scale

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.