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Finding the Fourth Proportional to 20,779,884.80, 31,098,968.40 and 20,779,884.80

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Solution

The fourth proportional to 20,779,884.80, 31,098,968.40 and 20,779,884.80 is: 31,098,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779,884.80 : 31,098,968.40 = 20,779,884.80 : x
  2. Step 2: Convert to fraction form
    20,779,884.80/31,098,968.40 = 20,779,884.80/x
  3. Step 3: Cross multiply
    20,779,884.80x = 31,098,968.40 × 20,779,884.80
  4. Step 4: Simplify right side
    20,779,884.80x = 646,232,980,750,840.25
  5. Step 5: Solve for x
    x = 646,232,980,750,840.25/20,779,884.80
  6. Step 6: Final answer
    x = 31,098,968.40

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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.