Home / 13,890.48-19,168.68-7,602.72

Finding the Fourth Proportional to 13,890.48, 19,168.68 and 7,602.72

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Solution

The fourth proportional to 13,890.48, 19,168.68 and 7,602.72 is: 10,491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.48 : 19,168.68 = 7,602.72 : x
  2. Step 2: Convert to fraction form
    13,890.48/19,168.68 = 7,602.72/x
  3. Step 3: Cross multiply
    13,890.48x = 19,168.68 × 7,602.72
  4. Step 4: Simplify right side
    13,890.48x = 145,734,106.81
  5. Step 5: Solve for x
    x = 145,734,106.81/13,890.48
  6. Step 6: Final answer
    x = 10,491.65

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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.