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Finding the Fourth Proportional to 12,865.80, 19,298.70 and 12,865.80

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Solution

The fourth proportional to 12,865.80, 19,298.70 and 12,865.80 is: 19,298.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,865.80 : 19,298.70 = 12,865.80 : x
  2. Step 2: Convert to fraction form
    12,865.80/19,298.70 = 12,865.80/x
  3. Step 3: Cross multiply
    12,865.80x = 19,298.70 × 12,865.80
  4. Step 4: Simplify right side
    12,865.80x = 248,293,214.46
  5. Step 5: Solve for x
    x = 248,293,214.46/12,865.80
  6. Step 6: Final answer
    x = 19,298.70

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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.