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Finding the Fourth Proportional to 10,857.92, 14,970.02 and 8,615.93

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Solution

The fourth proportional to 10,857.92, 14,970.02 and 8,615.93 is: 11,878.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,857.92 : 14,970.02 = 8,615.93 : x
  2. Step 2: Convert to fraction form
    10,857.92/14,970.02 = 8,615.93/x
  3. Step 3: Cross multiply
    10,857.92x = 14,970.02 × 8,615.93
  4. Step 4: Simplify right side
    10,857.92x = 128,980,526.49
  5. Step 5: Solve for x
    x = 128,980,526.49/10,857.92
  6. Step 6: Final answer
    x = 11,878.94

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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.