Home / 30,561,981.54-42,171,702.32-20,660,407.38

Finding the Fourth Proportional to 30,561,981.54, 42,171,702.32 and 20,660,407.38

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Solution

The fourth proportional to 30,561,981.54, 42,171,702.32 and 20,660,407.38 is: 28,508,771.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,561,981.54 : 42,171,702.32 = 20,660,407.38 : x
  2. Step 2: Convert to fraction form
    30,561,981.54/42,171,702.32 = 20,660,407.38/x
  3. Step 3: Cross multiply
    30,561,981.54x = 42,171,702.32 × 20,660,407.38
  4. Step 4: Simplify right side
    30,561,981.54x = 871,284,549,839,291.12
  5. Step 5: Solve for x
    x = 871,284,549,839,291.12/30,561,981.54
  6. Step 6: Final answer
    x = 28,508,771.55

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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.