Home / 5,187.26-7,780.88-1,291.67

Finding the Fourth Proportional to 5,187.26, 7,780.88 and 1,291.67

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Solution

The fourth proportional to 5,187.26, 7,780.88 and 1,291.67 is: 1,937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.26 : 7,780.88 = 1,291.67 : x
  2. Step 2: Convert to fraction form
    5,187.26/7,780.88 = 1,291.67/x
  3. Step 3: Cross multiply
    5,187.26x = 7,780.88 × 1,291.67
  4. Step 4: Simplify right side
    5,187.26x = 10,050,322.81
  5. Step 5: Solve for x
    x = 10,050,322.81/5,187.26
  6. Step 6: Final answer
    x = 1,937.50

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.