Home / 13,503.81-18,658.10-9,719.49

Finding the Fourth Proportional to 13,503.81, 18,658.10 and 9,719.49

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Solution

The fourth proportional to 13,503.81, 18,658.10 and 9,719.49 is: 13,429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.81 : 18,658.10 = 9,719.49 : x
  2. Step 2: Convert to fraction form
    13,503.81/18,658.10 = 9,719.49/x
  3. Step 3: Cross multiply
    13,503.81x = 18,658.10 × 9,719.49
  4. Step 4: Simplify right side
    13,503.81x = 181,347,167.77
  5. Step 5: Solve for x
    x = 181,347,167.77/13,503.81
  6. Step 6: Final answer
    x = 13,429.33

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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.