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Finding the Fourth Proportional to 15,656.49, 21,605.99 and 8,582.85

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Solution

The fourth proportional to 15,656.49, 21,605.99 and 8,582.85 is: 11,844.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,656.49 : 21,605.99 = 8,582.85 : x
  2. Step 2: Convert to fraction form
    15,656.49/21,605.99 = 8,582.85/x
  3. Step 3: Cross multiply
    15,656.49x = 21,605.99 × 8,582.85
  4. Step 4: Simplify right side
    15,656.49x = 185,440,928.36
  5. Step 5: Solve for x
    x = 185,440,928.36/15,656.49
  6. Step 6: Final answer
    x = 11,844.35

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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.