Home / 13,128.04-18,116.84-7,159.65

Finding the Fourth Proportional to 13,128.04, 18,116.84 and 7,159.65

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Solution

The fourth proportional to 13,128.04, 18,116.84 and 7,159.65 is: 9,880.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.04 : 18,116.84 = 7,159.65 : x
  2. Step 2: Convert to fraction form
    13,128.04/18,116.84 = 7,159.65/x
  3. Step 3: Cross multiply
    13,128.04x = 18,116.84 × 7,159.65
  4. Step 4: Simplify right side
    13,128.04x = 129,710,251.41
  5. Step 5: Solve for x
    x = 129,710,251.41/13,128.04
  6. Step 6: Final answer
    x = 9,880.40

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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.