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Finding the Fourth Proportional to 9,966,021.90, 13,961,878.50 and 9,966,021.90

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Solution

The fourth proportional to 9,966,021.90, 13,961,878.50 and 9,966,021.90 is: 13,961,878.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,966,021.90 : 13,961,878.50 = 9,966,021.90 : x
  2. Step 2: Convert to fraction form
    9,966,021.90/13,961,878.50 = 9,966,021.90/x
  3. Step 3: Cross multiply
    9,966,021.90x = 13,961,878.50 × 9,966,021.90
  4. Step 4: Simplify right side
    9,966,021.90x = 139,144,386,896,139.16
  5. Step 5: Solve for x
    x = 139,144,386,896,139.16/9,966,021.90
  6. Step 6: Final answer
    x = 13,961,878.50

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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.