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Finding the Fourth Proportional to 7,920,512.90, 11,880,769.35 and 7,920,512.90

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Solution

The fourth proportional to 7,920,512.90, 11,880,769.35 and 7,920,512.90 is: 11,880,769.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920,512.90 : 11,880,769.35 = 7,920,512.90 : x
  2. Step 2: Convert to fraction form
    7,920,512.90/11,880,769.35 = 7,920,512.90/x
  3. Step 3: Cross multiply
    7,920,512.90x = 11,880,769.35 × 7,920,512.90
  4. Step 4: Simplify right side
    7,920,512.90x = 94,101,786,898,599.61
  5. Step 5: Solve for x
    x = 94,101,786,898,599.61/7,920,512.90
  6. Step 6: Final answer
    x = 11,880,769.35

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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.