Home / 13,157.14-18,156.36-7,188.76

Finding the Fourth Proportional to 13,157.14, 18,156.36 and 7,188.76

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Solution

The fourth proportional to 13,157.14, 18,156.36 and 7,188.76 is: 9,920.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,157.14 : 18,156.36 = 7,188.76 : x
  2. Step 2: Convert to fraction form
    13,157.14/18,156.36 = 7,188.76/x
  3. Step 3: Cross multiply
    13,157.14x = 18,156.36 × 7,188.76
  4. Step 4: Simplify right side
    13,157.14x = 130,521,714.51
  5. Step 5: Solve for x
    x = 130,521,714.51/13,157.14
  6. Step 6: Final answer
    x = 9,920.22

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Half scale
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Double scale
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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.