Home / 13,389.39-18,475.65-7,420.95

Finding the Fourth Proportional to 13,389.39, 18,475.65 and 7,420.95

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Solution

The fourth proportional to 13,389.39, 18,475.65 and 7,420.95 is: 10,239.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.39 : 18,475.65 = 7,420.95 : x
  2. Step 2: Convert to fraction form
    13,389.39/18,475.65 = 7,420.95/x
  3. Step 3: Cross multiply
    13,389.39x = 18,475.65 × 7,420.95
  4. Step 4: Simplify right side
    13,389.39x = 137,106,874.87
  5. Step 5: Solve for x
    x = 137,106,874.87/13,389.39
  6. Step 6: Final answer
    x = 10,239.96

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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.