Home / 10,929.74-15,056.70-8,690.90

Finding the Fourth Proportional to 10,929.74, 15,056.70 and 8,690.90

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Solution

The fourth proportional to 10,929.74, 15,056.70 and 8,690.90 is: 11,972.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.74 : 15,056.70 = 8,690.90 : x
  2. Step 2: Convert to fraction form
    10,929.74/15,056.70 = 8,690.90/x
  3. Step 3: Cross multiply
    10,929.74x = 15,056.70 × 8,690.90
  4. Step 4: Simplify right side
    10,929.74x = 130,856,274.03
  5. Step 5: Solve for x
    x = 130,856,274.03/10,929.74
  6. Step 6: Final answer
    x = 11,972.50

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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.