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Finding the Fourth Proportional to 12,815.70, 19,223.55 and 10,847.40

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Solution

The fourth proportional to 12,815.70, 19,223.55 and 10,847.40 is: 16,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,815.70 : 19,223.55 = 10,847.40 : x
  2. Step 2: Convert to fraction form
    12,815.70/19,223.55 = 10,847.40/x
  3. Step 3: Cross multiply
    12,815.70x = 19,223.55 × 10,847.40
  4. Step 4: Simplify right side
    12,815.70x = 208,525,536.27
  5. Step 5: Solve for x
    x = 208,525,536.27/12,815.70
  6. Step 6: Final answer
    x = 16,271.10

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Similar ratio
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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.