Home / 13,430.24-18,530.88-7,838.72

Finding the Fourth Proportional to 13,430.24, 18,530.88 and 7,838.72

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Solution

The fourth proportional to 13,430.24, 18,530.88 and 7,838.72 is: 10,815.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.24 : 18,530.88 = 7,838.72 : x
  2. Step 2: Convert to fraction form
    13,430.24/18,530.88 = 7,838.72/x
  3. Step 3: Cross multiply
    13,430.24x = 18,530.88 × 7,838.72
  4. Step 4: Simplify right side
    13,430.24x = 145,258,379.67
  5. Step 5: Solve for x
    x = 145,258,379.67/13,430.24
  6. Step 6: Final answer
    x = 10,815.77

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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.