Home / 21,315.16-31,987.34-7,464.20

Finding the Fourth Proportional to 21,315.16, 31,987.34 and 7,464.20

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Solution

The fourth proportional to 21,315.16, 31,987.34 and 7,464.20 is: 11,201.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.16 : 31,987.34 = 7,464.20 : x
  2. Step 2: Convert to fraction form
    21,315.16/31,987.34 = 7,464.20/x
  3. Step 3: Cross multiply
    21,315.16x = 31,987.34 × 7,464.20
  4. Step 4: Simplify right side
    21,315.16x = 238,759,903.23
  5. Step 5: Solve for x
    x = 238,759,903.23/21,315.16
  6. Step 6: Final answer
    x = 11,201.41

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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.