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Finding the Fourth Proportional to 8,749.69, 13,130.69 and 7,913.17

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Solution

The fourth proportional to 8,749.69, 13,130.69 and 7,913.17 is: 11,875.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,749.69 : 13,130.69 = 7,913.17 : x
  2. Step 2: Convert to fraction form
    8,749.69/13,130.69 = 7,913.17/x
  3. Step 3: Cross multiply
    8,749.69x = 13,130.69 × 7,913.17
  4. Step 4: Simplify right side
    8,749.69x = 103,905,316.53
  5. Step 5: Solve for x
    x = 103,905,316.53/8,749.69
  6. Step 6: Final answer
    x = 11,875.31

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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.