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Finding the Fourth Proportional to 13,286,140.80, 19,897,718.40 and 13,286,140.80

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Solution

The fourth proportional to 13,286,140.80, 19,897,718.40 and 13,286,140.80 is: 19,897,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286,140.80 : 19,897,718.40 = 13,286,140.80 : x
  2. Step 2: Convert to fraction form
    13,286,140.80/19,897,718.40 = 13,286,140.80/x
  3. Step 3: Cross multiply
    13,286,140.80x = 19,897,718.40 × 13,286,140.80
  4. Step 4: Simplify right side
    13,286,140.80x = 264,363,888,261,150.72
  5. Step 5: Solve for x
    x = 264,363,888,261,150.72/13,286,140.80
  6. Step 6: Final answer
    x = 19,897,718.40

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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.