Home / 10,359.40-15,539.10-9,905.80

Finding the Fourth Proportional to 10,359.40, 15,539.10 and 9,905.80

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Solution

The fourth proportional to 10,359.40, 15,539.10 and 9,905.80 is: 14,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,359.40 : 15,539.10 = 9,905.80 : x
  2. Step 2: Convert to fraction form
    10,359.40/15,539.10 = 9,905.80/x
  3. Step 3: Cross multiply
    10,359.40x = 15,539.10 × 9,905.80
  4. Step 4: Simplify right side
    10,359.40x = 153,927,216.78
  5. Step 5: Solve for x
    x = 153,927,216.78/10,359.40
  6. Step 6: Final answer
    x = 14,858.70

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1.5x scale

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.