Home / 9,989,459.78-13,785,454.55-5,405,781.20

Finding the Fourth Proportional to 9,989,459.78, 13,785,454.55 and 5,405,781.20

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Solution

The fourth proportional to 9,989,459.78, 13,785,454.55 and 5,405,781.20 is: 7,459,978.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989,459.78 : 13,785,454.55 = 5,405,781.20 : x
  2. Step 2: Convert to fraction form
    9,989,459.78/13,785,454.55 = 5,405,781.20/x
  3. Step 3: Cross multiply
    9,989,459.78x = 13,785,454.55 × 5,405,781.20
  4. Step 4: Simplify right side
    9,989,459.78x = 74,521,151,039,844.47
  5. Step 5: Solve for x
    x = 74,521,151,039,844.47/9,989,459.78
  6. Step 6: Final answer
    x = 7,459,978.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.