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Finding the Fourth Proportional to 9,783.76, 13,503.78 and 7,655.08

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Solution

The fourth proportional to 9,783.76, 13,503.78 and 7,655.08 is: 10,565.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,783.76 : 13,503.78 = 7,655.08 : x
  2. Step 2: Convert to fraction form
    9,783.76/13,503.78 = 7,655.08/x
  3. Step 3: Cross multiply
    9,783.76x = 13,503.78 × 7,655.08
  4. Step 4: Simplify right side
    9,783.76x = 103,372,516.20
  5. Step 5: Solve for x
    x = 103,372,516.20/9,783.76
  6. Step 6: Final answer
    x = 10,565.72

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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.