Home / 13,108.53-18,089.63-7,140.20

Finding the Fourth Proportional to 13,108.53, 18,089.63 and 7,140.20

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Solution

The fourth proportional to 13,108.53, 18,089.63 and 7,140.20 is: 9,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,108.53 : 18,089.63 = 7,140.20 : x
  2. Step 2: Convert to fraction form
    13,108.53/18,089.63 = 7,140.20/x
  3. Step 3: Cross multiply
    13,108.53x = 18,089.63 × 7,140.20
  4. Step 4: Simplify right side
    13,108.53x = 129,163,578.51
  5. Step 5: Solve for x
    x = 129,163,578.51/13,108.53
  6. Step 6: Final answer
    x = 9,853.40

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Half scale
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Double scale
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Similar ratio
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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.