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Finding the Fourth Proportional to 12,897.80, 19,346.70 and 7,368.20

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Solution

The fourth proportional to 12,897.80, 19,346.70 and 7,368.20 is: 11,052.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,897.80 : 19,346.70 = 7,368.20 : x
  2. Step 2: Convert to fraction form
    12,897.80/19,346.70 = 7,368.20/x
  3. Step 3: Cross multiply
    12,897.80x = 19,346.70 × 7,368.20
  4. Step 4: Simplify right side
    12,897.80x = 142,550,354.94
  5. Step 5: Solve for x
    x = 142,550,354.94/12,897.80
  6. Step 6: Final answer
    x = 11,052.30

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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.