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Finding the Fourth Proportional to 20,702,989.40, 31,054,484.10 and 20,702,989.40

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Solution

The fourth proportional to 20,702,989.40, 31,054,484.10 and 20,702,989.40 is: 31,054,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702,989.40 : 31,054,484.10 = 20,702,989.40 : x
  2. Step 2: Convert to fraction form
    20,702,989.40/31,054,484.10 = 20,702,989.40/x
  3. Step 3: Cross multiply
    20,702,989.40x = 31,054,484.10 × 20,702,989.40
  4. Step 4: Simplify right side
    20,702,989.40x = 642,920,655,144,768.50
  5. Step 5: Solve for x
    x = 642,920,655,144,768.50/20,702,989.40
  6. Step 6: Final answer
    x = 31,054,484.10

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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.