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Finding the Fourth Proportional to 12,696,307.20, 19,044,460.80 and 12,507,350.40

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Solution

The fourth proportional to 12,696,307.20, 19,044,460.80 and 12,507,350.40 is: 18,761,025.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696,307.20 : 19,044,460.80 = 12,507,350.40 : x
  2. Step 2: Convert to fraction form
    12,696,307.20/19,044,460.80 = 12,507,350.40/x
  3. Step 3: Cross multiply
    12,696,307.20x = 19,044,460.80 × 12,507,350.40
  4. Step 4: Simplify right side
    12,696,307.20x = 238,195,744,404,664.34
  5. Step 5: Solve for x
    x = 238,195,744,404,664.34/12,696,307.20
  6. Step 6: Final answer
    x = 18,761,025.60

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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.