Home / 13,685.11-18,885.43-7,397.49

Finding the Fourth Proportional to 13,685.11, 18,885.43 and 7,397.49

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Solution

The fourth proportional to 13,685.11, 18,885.43 and 7,397.49 is: 10,208.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.11 : 18,885.43 = 7,397.49 : x
  2. Step 2: Convert to fraction form
    13,685.11/18,885.43 = 7,397.49/x
  3. Step 3: Cross multiply
    13,685.11x = 18,885.43 × 7,397.49
  4. Step 4: Simplify right side
    13,685.11x = 139,704,779.57
  5. Step 5: Solve for x
    x = 139,704,779.57/13,685.11
  6. Step 6: Final answer
    x = 10,208.52

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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.