Home / 21,977.28-30,328.23-12,545.64

Finding the Fourth Proportional to 21,977.28, 30,328.23 and 12,545.64

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Solution

The fourth proportional to 21,977.28, 30,328.23 and 12,545.64 is: 17,312.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.28 : 30,328.23 = 12,545.64 : x
  2. Step 2: Convert to fraction form
    21,977.28/30,328.23 = 12,545.64/x
  3. Step 3: Cross multiply
    21,977.28x = 30,328.23 × 12,545.64
  4. Step 4: Simplify right side
    21,977.28x = 380,487,055.42
  5. Step 5: Solve for x
    x = 380,487,055.42/21,977.28
  6. Step 6: Final answer
    x = 17,312.75

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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.