Home / 13,209.19-18,228.64-7,159.61

Finding the Fourth Proportional to 13,209.19, 18,228.64 and 7,159.61

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Solution

The fourth proportional to 13,209.19, 18,228.64 and 7,159.61 is: 9,880.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,209.19 : 18,228.64 = 7,159.61 : x
  2. Step 2: Convert to fraction form
    13,209.19/18,228.64 = 7,159.61/x
  3. Step 3: Cross multiply
    13,209.19x = 18,228.64 × 7,159.61
  4. Step 4: Simplify right side
    13,209.19x = 130,509,953.23
  5. Step 5: Solve for x
    x = 130,509,953.23/13,209.19
  6. Step 6: Final answer
    x = 9,880.24

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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.