Home / 13,158.10-18,156.18-7,490.80

Finding the Fourth Proportional to 13,158.10, 18,156.18 and 7,490.80

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Solution

The fourth proportional to 13,158.10, 18,156.18 and 7,490.80 is: 10,336.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.10 : 18,156.18 = 7,490.80 : x
  2. Step 2: Convert to fraction form
    13,158.10/18,156.18 = 7,490.80/x
  3. Step 3: Cross multiply
    13,158.10x = 18,156.18 × 7,490.80
  4. Step 4: Simplify right side
    13,158.10x = 136,004,313.14
  5. Step 5: Solve for x
    x = 136,004,313.14/13,158.10
  6. Step 6: Final answer
    x = 10,336.17

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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.