Home / 9,780.55-13,503.00-6,428.97

Finding the Fourth Proportional to 9,780.55, 13,503.00 and 6,428.97

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Solution

The fourth proportional to 9,780.55, 13,503.00 and 6,428.97 is: 8,875.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,780.55 : 13,503.00 = 6,428.97 : x
  2. Step 2: Convert to fraction form
    9,780.55/13,503.00 = 6,428.97/x
  3. Step 3: Cross multiply
    9,780.55x = 13,503.00 × 6,428.97
  4. Step 4: Simplify right side
    9,780.55x = 86,810,406.02
  5. Step 5: Solve for x
    x = 86,810,406.02/9,780.55
  6. Step 6: Final answer
    x = 8,875.82

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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.