Home / 20,345.40-30,495.84-10,485.36

Finding the Fourth Proportional to 20,345.40, 30,495.84 and 10,485.36

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Solution

The fourth proportional to 20,345.40, 30,495.84 and 10,485.36 is: 15,716.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.40 : 30,495.84 = 10,485.36 : x
  2. Step 2: Convert to fraction form
    20,345.40/30,495.84 = 10,485.36/x
  3. Step 3: Cross multiply
    20,345.40x = 30,495.84 × 10,485.36
  4. Step 4: Simplify right side
    20,345.40x = 319,759,860.90
  5. Step 5: Solve for x
    x = 319,759,860.90/20,345.40
  6. Step 6: Final answer
    x = 15,716.57

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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.