Home / 13,389.10-18,476.64-7,723.85

Finding the Fourth Proportional to 13,389.10, 18,476.64 and 7,723.85

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Solution

The fourth proportional to 13,389.10, 18,476.64 and 7,723.85 is: 10,658.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.10 : 18,476.64 = 7,723.85 : x
  2. Step 2: Convert to fraction form
    13,389.10/18,476.64 = 7,723.85/x
  3. Step 3: Cross multiply
    13,389.10x = 18,476.64 × 7,723.85
  4. Step 4: Simplify right side
    13,389.10x = 142,710,703.48
  5. Step 5: Solve for x
    x = 142,710,703.48/13,389.10
  6. Step 6: Final answer
    x = 10,658.72

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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.