Home / 21,478.32-29,622.51-15,125.99

Finding the Fourth Proportional to 21,478.32, 29,622.51 and 15,125.99

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Solution

The fourth proportional to 21,478.32, 29,622.51 and 15,125.99 is: 20,861.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.32 : 29,622.51 = 15,125.99 : x
  2. Step 2: Convert to fraction form
    21,478.32/29,622.51 = 15,125.99/x
  3. Step 3: Cross multiply
    21,478.32x = 29,622.51 × 15,125.99
  4. Step 4: Simplify right side
    21,478.32x = 448,069,641.92
  5. Step 5: Solve for x
    x = 448,069,641.92/21,478.32
  6. Step 6: Final answer
    x = 20,861.48

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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.