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Finding the Fourth Proportional to 20,401,957.70, 30,602,936.55 and 20,213,000.90

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Solution

The fourth proportional to 20,401,957.70, 30,602,936.55 and 20,213,000.90 is: 30,319,501.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401,957.70 : 30,602,936.55 = 20,213,000.90 : x
  2. Step 2: Convert to fraction form
    20,401,957.70/30,602,936.55 = 20,213,000.90/x
  3. Step 3: Cross multiply
    20,401,957.70x = 30,602,936.55 × 20,213,000.90
  4. Step 4: Simplify right side
    20,401,957.70x = 618,577,184,027,792.88
  5. Step 5: Solve for x
    x = 618,577,184,027,792.88/20,401,957.70
  6. Step 6: Final answer
    x = 30,319,501.35

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1.5x scale

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.