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Finding the Fourth Proportional to 12,456,847.70, 18,685,271.55 and 12,456,847.70

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Solution

The fourth proportional to 12,456,847.70, 18,685,271.55 and 12,456,847.70 is: 18,685,271.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456,847.70 : 18,685,271.55 = 12,456,847.70 : x
  2. Step 2: Convert to fraction form
    12,456,847.70/18,685,271.55 = 12,456,847.70/x
  3. Step 3: Cross multiply
    12,456,847.70x = 18,685,271.55 × 12,456,847.70
  4. Step 4: Simplify right side
    12,456,847.70x = 232,759,581,931,492.94
  5. Step 5: Solve for x
    x = 232,759,581,931,492.94/12,456,847.70
  6. Step 6: Final answer
    x = 18,685,271.55

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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.