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Finding the Fourth Proportional to 11,871,502.40, 17,786,258.40 and 10,065,915.20

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Solution

The fourth proportional to 11,871,502.40, 17,786,258.40 and 10,065,915.20 is: 15,081,070.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,871,502.40 : 17,786,258.40 = 10,065,915.20 : x
  2. Step 2: Convert to fraction form
    11,871,502.40/17,786,258.40 = 10,065,915.20/x
  3. Step 3: Cross multiply
    11,871,502.40x = 17,786,258.40 × 10,065,915.20
  4. Step 4: Simplify right side
    11,871,502.40x = 179,034,968,779,687.66
  5. Step 5: Solve for x
    x = 179,034,968,779,687.66/11,871,502.40
  6. Step 6: Final answer
    x = 15,081,070.85

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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.