Home / 10,905.60-15,053.04-6,429

Finding the Fourth Proportional to 10,905.60, 15,053.04 and 6,429

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Solution

The fourth proportional to 10,905.60, 15,053.04 and 6,429 is: 8,873.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.60 : 15,053.04 = 6,429 : x
  2. Step 2: Convert to fraction form
    10,905.60/15,053.04 = 6,429/x
  3. Step 3: Cross multiply
    10,905.60x = 15,053.04 × 6,429
  4. Step 4: Simplify right side
    10,905.60x = 96,775,994.16
  5. Step 5: Solve for x
    x = 96,775,994.16/10,905.60
  6. Step 6: Final answer
    x = 8,873.97

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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.