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Finding the Fourth Proportional to 15,176.98, 20,955.02 and 12,665.58

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Solution

The fourth proportional to 15,176.98, 20,955.02 and 12,665.58 is: 17,487.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,176.98 : 20,955.02 = 12,665.58 : x
  2. Step 2: Convert to fraction form
    15,176.98/20,955.02 = 12,665.58/x
  3. Step 3: Cross multiply
    15,176.98x = 20,955.02 × 12,665.58
  4. Step 4: Simplify right side
    15,176.98x = 265,407,482.21
  5. Step 5: Solve for x
    x = 265,407,482.21/15,176.98
  6. Step 6: Final answer
    x = 17,487.50

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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.