Home / 30,561,980.29-42,171,700.60-20,660,406.14

Finding the Fourth Proportional to 30,561,980.29, 42,171,700.60 and 20,660,406.14

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Solution

The fourth proportional to 30,561,980.29, 42,171,700.60 and 20,660,406.14 is: 28,508,769.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,561,980.29 : 42,171,700.60 = 20,660,406.14 : x
  2. Step 2: Convert to fraction form
    30,561,980.29/42,171,700.60 = 20,660,406.14/x
  3. Step 3: Cross multiply
    30,561,980.29x = 42,171,700.60 × 20,660,406.14
  4. Step 4: Simplify right side
    30,561,980.29x = 871,284,461,747,972.12
  5. Step 5: Solve for x
    x = 871,284,461,747,972.12/30,561,980.29
  6. Step 6: Final answer
    x = 28,508,769.84

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1.5x scale

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.