Home / 13,125.84-18,113.30-7,157.63

Finding the Fourth Proportional to 13,125.84, 18,113.30 and 7,157.63

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Solution

The fourth proportional to 13,125.84, 18,113.30 and 7,157.63 is: 9,877.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.84 : 18,113.30 = 7,157.63 : x
  2. Step 2: Convert to fraction form
    13,125.84/18,113.30 = 7,157.63/x
  3. Step 3: Cross multiply
    13,125.84x = 18,113.30 × 7,157.63
  4. Step 4: Simplify right side
    13,125.84x = 129,648,173.12
  5. Step 5: Solve for x
    x = 129,648,173.12/13,125.84
  6. Step 6: Final answer
    x = 9,877.32

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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.