Home / 10,830.20-16,247.70-4,985.40

Finding the Fourth Proportional to 10,830.20, 16,247.70 and 4,985.40

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Solution

The fourth proportional to 10,830.20, 16,247.70 and 4,985.40 is: 7,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,830.20 : 16,247.70 = 4,985.40 : x
  2. Step 2: Convert to fraction form
    10,830.20/16,247.70 = 4,985.40/x
  3. Step 3: Cross multiply
    10,830.20x = 16,247.70 × 4,985.40
  4. Step 4: Simplify right side
    10,830.20x = 81,001,283.58
  5. Step 5: Solve for x
    x = 81,001,283.58/10,830.20
  6. Step 6: Final answer
    x = 7,479.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.