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Finding the Fourth Proportional to 15,554.50, 21,465.21 and 9,965.50

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Solution

The fourth proportional to 15,554.50, 21,465.21 and 9,965.50 is: 13,752.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,554.50 : 21,465.21 = 9,965.50 : x
  2. Step 2: Convert to fraction form
    15,554.50/21,465.21 = 9,965.50/x
  3. Step 3: Cross multiply
    15,554.50x = 21,465.21 × 9,965.50
  4. Step 4: Simplify right side
    15,554.50x = 213,911,550.26
  5. Step 5: Solve for x
    x = 213,911,550.26/15,554.50
  6. Step 6: Final answer
    x = 13,752.39

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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.