Home / 10,909.13-15,055.20-6,435.50

Finding the Fourth Proportional to 10,909.13, 15,055.20 and 6,435.50

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Solution

The fourth proportional to 10,909.13, 15,055.20 and 6,435.50 is: 8,881.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,909.13 : 15,055.20 = 6,435.50 : x
  2. Step 2: Convert to fraction form
    10,909.13/15,055.20 = 6,435.50/x
  3. Step 3: Cross multiply
    10,909.13x = 15,055.20 × 6,435.50
  4. Step 4: Simplify right side
    10,909.13x = 96,887,664.32
  5. Step 5: Solve for x
    x = 96,887,664.32/10,909.13
  6. Step 6: Final answer
    x = 8,881.34

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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.