Home / 20,798.40-31,155.36-15,809.52

Finding the Fourth Proportional to 20,798.40, 31,155.36 and 15,809.52

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Solution

The fourth proportional to 20,798.40, 31,155.36 and 15,809.52 is: 23,682.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.40 : 31,155.36 = 15,809.52 : x
  2. Step 2: Convert to fraction form
    20,798.40/31,155.36 = 15,809.52/x
  3. Step 3: Cross multiply
    20,798.40x = 31,155.36 × 15,809.52
  4. Step 4: Simplify right side
    20,798.40x = 492,551,287.03
  5. Step 5: Solve for x
    x = 492,551,287.03/20,798.40
  6. Step 6: Final answer
    x = 23,682.17

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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.