Home / 13,642.21-20,461.29-3,780.46

Finding the Fourth Proportional to 13,642.21, 20,461.29 and 3,780.46

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Solution

The fourth proportional to 13,642.21, 20,461.29 and 3,780.46 is: 5,670.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,642.21 : 20,461.29 = 3,780.46 : x
  2. Step 2: Convert to fraction form
    13,642.21/20,461.29 = 3,780.46/x
  3. Step 3: Cross multiply
    13,642.21x = 20,461.29 × 3,780.46
  4. Step 4: Simplify right side
    13,642.21x = 77,353,088.39
  5. Step 5: Solve for x
    x = 77,353,088.39/13,642.21
  6. Step 6: Final answer
    x = 5,670.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.