Home / 30,899.07-42,627.09-20,823.84

Finding the Fourth Proportional to 30,899.07, 42,627.09 and 20,823.84

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Solution

The fourth proportional to 30,899.07, 42,627.09 and 20,823.84 is: 28,727.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,899.07 : 42,627.09 = 20,823.84 : x
  2. Step 2: Convert to fraction form
    30,899.07/42,627.09 = 20,823.84/x
  3. Step 3: Cross multiply
    30,899.07x = 42,627.09 × 20,823.84
  4. Step 4: Simplify right side
    30,899.07x = 887,659,701.83
  5. Step 5: Solve for x
    x = 887,659,701.83/30,899.07
  6. Step 6: Final answer
    x = 28,727.72

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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.