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Finding the Fourth Proportional to 12,695,861.70, 19,043,792.55 and 12,506,904.90

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Solution

The fourth proportional to 12,695,861.70, 19,043,792.55 and 12,506,904.90 is: 18,760,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695,861.70 : 19,043,792.55 = 12,506,904.90 : x
  2. Step 2: Convert to fraction form
    12,695,861.70/19,043,792.55 = 12,506,904.90/x
  3. Step 3: Cross multiply
    12,695,861.70x = 19,043,792.55 × 12,506,904.90
  4. Step 4: Simplify right side
    12,695,861.70x = 238,178,902,358,178.50
  5. Step 5: Solve for x
    x = 238,178,902,358,178.50/12,695,861.70
  6. Step 6: Final answer
    x = 18,760,357.35

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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.