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Finding the Fourth Proportional to 9,860.79, 13,607.70 and 5,384.42

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Solution

The fourth proportional to 9,860.79, 13,607.70 and 5,384.42 is: 7,430.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,860.79 : 13,607.70 = 5,384.42 : x
  2. Step 2: Convert to fraction form
    9,860.79/13,607.70 = 5,384.42/x
  3. Step 3: Cross multiply
    9,860.79x = 13,607.70 × 5,384.42
  4. Step 4: Simplify right side
    9,860.79x = 73,269,611.38
  5. Step 5: Solve for x
    x = 73,269,611.38/9,860.79
  6. Step 6: Final answer
    x = 7,430.40

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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.