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Finding the Fourth Proportional to 7,886,320.40, 11,070,708.40 and 7,886,320.40

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Solution

The fourth proportional to 7,886,320.40, 11,070,708.40 and 7,886,320.40 is: 11,070,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886,320.40 : 11,070,708.40 = 7,886,320.40 : x
  2. Step 2: Convert to fraction form
    7,886,320.40/11,070,708.40 = 7,886,320.40/x
  3. Step 3: Cross multiply
    7,886,320.40x = 11,070,708.40 × 7,886,320.40
  4. Step 4: Simplify right side
    7,886,320.40x = 87,307,153,497,371.36
  5. Step 5: Solve for x
    x = 87,307,153,497,371.36/7,886,320.40
  6. Step 6: Final answer
    x = 11,070,708.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.