Home / 13,778.20-19,014.13-7,809.74

Finding the Fourth Proportional to 13,778.20, 19,014.13 and 7,809.74

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Solution

The fourth proportional to 13,778.20, 19,014.13 and 7,809.74 is: 10,777.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.20 : 19,014.13 = 7,809.74 : x
  2. Step 2: Convert to fraction form
    13,778.20/19,014.13 = 7,809.74/x
  3. Step 3: Cross multiply
    13,778.20x = 19,014.13 × 7,809.74
  4. Step 4: Simplify right side
    13,778.20x = 148,495,478.69
  5. Step 5: Solve for x
    x = 148,495,478.69/13,778.20
  6. Step 6: Final answer
    x = 10,777.57

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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.