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Finding the Fourth Proportional to 15,605.19, 21,535.67 and 8,891.10

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Solution

The fourth proportional to 15,605.19, 21,535.67 and 8,891.10 is: 12,270.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.19 : 21,535.67 = 8,891.10 : x
  2. Step 2: Convert to fraction form
    15,605.19/21,535.67 = 8,891.10/x
  3. Step 3: Cross multiply
    15,605.19x = 21,535.67 × 8,891.10
  4. Step 4: Simplify right side
    15,605.19x = 191,475,817.76
  5. Step 5: Solve for x
    x = 191,475,817.76/15,605.19
  6. Step 6: Final answer
    x = 12,270.01

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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.