Home / 30,808.81-42,520.54-17,381.30

Finding the Fourth Proportional to 30,808.81, 42,520.54 and 17,381.30

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Solution

The fourth proportional to 30,808.81, 42,520.54 and 17,381.30 is: 23,988.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,808.81 : 42,520.54 = 17,381.30 : x
  2. Step 2: Convert to fraction form
    30,808.81/42,520.54 = 17,381.30/x
  3. Step 3: Cross multiply
    30,808.81x = 42,520.54 × 17,381.30
  4. Step 4: Simplify right side
    30,808.81x = 739,062,261.90
  5. Step 5: Solve for x
    x = 739,062,261.90/30,808.81
  6. Step 6: Final answer
    x = 23,988.67

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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.