Home / 20,315.16-28,032.24-11,362.32

Finding the Fourth Proportional to 20,315.16, 28,032.24 and 11,362.32

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Solution

The fourth proportional to 20,315.16, 28,032.24 and 11,362.32 is: 15,678.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.16 : 28,032.24 = 11,362.32 : x
  2. Step 2: Convert to fraction form
    20,315.16/28,032.24 = 11,362.32/x
  3. Step 3: Cross multiply
    20,315.16x = 28,032.24 × 11,362.32
  4. Step 4: Simplify right side
    20,315.16x = 318,511,281.20
  5. Step 5: Solve for x
    x = 318,511,281.20/20,315.16
  6. Step 6: Final answer
    x = 15,678.50

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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.