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Finding the Fourth Proportional to 7,664.61, 10,621.55 and 7,516.99

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Solution

The fourth proportional to 7,664.61, 10,621.55 and 7,516.99 is: 10,416.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,664.61 : 10,621.55 = 7,516.99 : x
  2. Step 2: Convert to fraction form
    7,664.61/10,621.55 = 7,516.99/x
  3. Step 3: Cross multiply
    7,664.61x = 10,621.55 × 7,516.99
  4. Step 4: Simplify right side
    7,664.61x = 79,842,085.13
  5. Step 5: Solve for x
    x = 79,842,085.13/7,664.61
  6. Step 6: Final answer
    x = 10,416.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.