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Finding the Fourth Proportional to 12,357,998.40, 18,525,938.40 and 4,782,446.40

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Solution

The fourth proportional to 12,357,998.40, 18,525,938.40 and 4,782,446.40 is: 7,169,389.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,357,998.40 : 18,525,938.40 = 4,782,446.40 : x
  2. Step 2: Convert to fraction form
    12,357,998.40/18,525,938.40 = 4,782,446.40/x
  3. Step 3: Cross multiply
    12,357,998.40x = 18,525,938.40 × 4,782,446.40
  4. Step 4: Simplify right side
    12,357,998.40x = 88,599,307,407,701.77
  5. Step 5: Solve for x
    x = 88,599,307,407,701.77/12,357,998.40
  6. Step 6: Final answer
    x = 7,169,389.78

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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.