Home / 30,561,985.53-42,171,707.85-20,660,411.37

Finding the Fourth Proportional to 30,561,985.53, 42,171,707.85 and 20,660,411.37

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Solution

The fourth proportional to 30,561,985.53, 42,171,707.85 and 20,660,411.37 is: 28,508,777.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,561,985.53 : 42,171,707.85 = 20,660,411.37 : x
  2. Step 2: Convert to fraction form
    30,561,985.53/42,171,707.85 = 20,660,411.37/x
  3. Step 3: Cross multiply
    30,561,985.53x = 42,171,707.85 × 20,660,411.37
  4. Step 4: Simplify right side
    30,561,985.53x = 871,284,832,356,458.38
  5. Step 5: Solve for x
    x = 871,284,832,356,458.38/30,561,985.53
  6. Step 6: Final answer
    x = 28,508,777.07

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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.