Home / 10,839.40-14,900.45-9,770.20

Finding the Fourth Proportional to 10,839.40, 14,900.45 and 9,770.20

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Solution

The fourth proportional to 10,839.40, 14,900.45 and 9,770.20 is: 13,430.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,839.40 : 14,900.45 = 9,770.20 : x
  2. Step 2: Convert to fraction form
    10,839.40/14,900.45 = 9,770.20/x
  3. Step 3: Cross multiply
    10,839.40x = 14,900.45 × 9,770.20
  4. Step 4: Simplify right side
    10,839.40x = 145,580,376.59
  5. Step 5: Solve for x
    x = 145,580,376.59/10,839.40
  6. Step 6: Final answer
    x = 13,430.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.