Home / 20,871,904.70-28,799,980.25-11,930,887.25

Finding the Fourth Proportional to 20,871,904.70, 28,799,980.25 and 11,930,887.25

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Solution

The fourth proportional to 20,871,904.70, 28,799,980.25 and 11,930,887.25 is: 16,462,767.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871,904.70 : 28,799,980.25 = 11,930,887.25 : x
  2. Step 2: Convert to fraction form
    20,871,904.70/28,799,980.25 = 11,930,887.25/x
  3. Step 3: Cross multiply
    20,871,904.70x = 28,799,980.25 × 11,930,887.25
  4. Step 4: Simplify right side
    20,871,904.70x = 343,609,317,037,692.81
  5. Step 5: Solve for x
    x = 343,609,317,037,692.81/20,871,904.70
  6. Step 6: Final answer
    x = 16,462,767.63

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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.