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Finding the Fourth Proportional to 21,143,421.30, 29,537,016.90 and 21,143,421.30

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Solution

The fourth proportional to 21,143,421.30, 29,537,016.90 and 21,143,421.30 is: 29,537,016.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143,421.30 : 29,537,016.90 = 21,143,421.30 : x
  2. Step 2: Convert to fraction form
    21,143,421.30/29,537,016.90 = 21,143,421.30/x
  3. Step 3: Cross multiply
    21,143,421.30x = 29,537,016.90 × 21,143,421.30
  4. Step 4: Simplify right side
    21,143,421.30x = 624,513,592,261,920
  5. Step 5: Solve for x
    x = 624,513,592,261,920/21,143,421.30
  6. Step 6: Final answer
    x = 29,537,016.90

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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.