Home / 30,810.21-42,498.51-20,200.53

Finding the Fourth Proportional to 30,810.21, 42,498.51 and 20,200.53

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Solution

The fourth proportional to 30,810.21, 42,498.51 and 20,200.53 is: 27,863.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,810.21 : 42,498.51 = 20,200.53 : x
  2. Step 2: Convert to fraction form
    30,810.21/42,498.51 = 20,200.53/x
  3. Step 3: Cross multiply
    30,810.21x = 42,498.51 × 20,200.53
  4. Step 4: Simplify right side
    30,810.21x = 858,492,426.21
  5. Step 5: Solve for x
    x = 858,492,426.21/30,810.21
  6. Step 6: Final answer
    x = 27,863.89

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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.