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Finding the Fourth Proportional to 8,670.87, 11,966.81 and 5,312.93

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Solution

The fourth proportional to 8,670.87, 11,966.81 and 5,312.93 is: 7,332.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,670.87 : 11,966.81 = 5,312.93 : x
  2. Step 2: Convert to fraction form
    8,670.87/11,966.81 = 5,312.93/x
  3. Step 3: Cross multiply
    8,670.87x = 11,966.81 × 5,312.93
  4. Step 4: Simplify right side
    8,670.87x = 63,578,737.45
  5. Step 5: Solve for x
    x = 63,578,737.45/8,670.87
  6. Step 6: Final answer
    x = 7,332.45

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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.