Home / 12,128,411.70-18,192,617.55-11,968,979.40

Finding the Fourth Proportional to 12,128,411.70, 18,192,617.55 and 11,968,979.40

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Solution

The fourth proportional to 12,128,411.70, 18,192,617.55 and 11,968,979.40 is: 17,953,469.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,411.70 : 18,192,617.55 = 11,968,979.40 : x
  2. Step 2: Convert to fraction form
    12,128,411.70/18,192,617.55 = 11,968,979.40/x
  3. Step 3: Cross multiply
    12,128,411.70x = 18,192,617.55 × 11,968,979.40
  4. Step 4: Simplify right side
    12,128,411.70x = 217,747,064,688,028.50
  5. Step 5: Solve for x
    x = 217,747,064,688,028.50/12,128,411.70
  6. Step 6: Final answer
    x = 17,953,469.10

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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.