Home / 20,509.83-30,743.15-10,638.63

Finding the Fourth Proportional to 20,509.83, 30,743.15 and 10,638.63

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Solution

The fourth proportional to 20,509.83, 30,743.15 and 10,638.63 is: 15,946.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,509.83 : 30,743.15 = 10,638.63 : x
  2. Step 2: Convert to fraction form
    20,509.83/30,743.15 = 10,638.63/x
  3. Step 3: Cross multiply
    20,509.83x = 30,743.15 × 10,638.63
  4. Step 4: Simplify right side
    20,509.83x = 327,064,944.69
  5. Step 5: Solve for x
    x = 327,064,944.69/20,509.83
  6. Step 6: Final answer
    x = 15,946.74

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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.