Home / 21,018.16-31,507.88-7,157.52

Finding the Fourth Proportional to 21,018.16, 31,507.88 and 7,157.52

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Solution

The fourth proportional to 21,018.16, 31,507.88 and 7,157.52 is: 10,729.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.16 : 31,507.88 = 7,157.52 : x
  2. Step 2: Convert to fraction form
    21,018.16/31,507.88 = 7,157.52/x
  3. Step 3: Cross multiply
    21,018.16x = 31,507.88 × 7,157.52
  4. Step 4: Simplify right side
    21,018.16x = 225,518,281.26
  5. Step 5: Solve for x
    x = 225,518,281.26/21,018.16
  6. Step 6: Final answer
    x = 10,729.69

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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.