Home / 21,280.32-31,931.42-9,442.21

Finding the Fourth Proportional to 21,280.32, 31,931.42 and 9,442.21

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Solution

The fourth proportional to 21,280.32, 31,931.42 and 9,442.21 is: 14,168.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,280.32 : 31,931.42 = 9,442.21 : x
  2. Step 2: Convert to fraction form
    21,280.32/31,931.42 = 9,442.21/x
  3. Step 3: Cross multiply
    21,280.32x = 31,931.42 × 9,442.21
  4. Step 4: Simplify right side
    21,280.32x = 301,503,173.24
  5. Step 5: Solve for x
    x = 301,503,173.24/21,280.32
  6. Step 6: Final answer
    x = 14,168.17

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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.