Home / 13,120.65-18,106.38-7,152.32

Finding the Fourth Proportional to 13,120.65, 18,106.38 and 7,152.32

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Solution

The fourth proportional to 13,120.65, 18,106.38 and 7,152.32 is: 9,870.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.65 : 18,106.38 = 7,152.32 : x
  2. Step 2: Convert to fraction form
    13,120.65/18,106.38 = 7,152.32/x
  3. Step 3: Cross multiply
    13,120.65x = 18,106.38 × 7,152.32
  4. Step 4: Simplify right side
    13,120.65x = 129,502,588.04
  5. Step 5: Solve for x
    x = 129,502,588.04/13,120.65
  6. Step 6: Final answer
    x = 9,870.14

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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.