Home / 13,117.02-18,099.37-7,811.70

Finding the Fourth Proportional to 13,117.02, 18,099.37 and 7,811.70

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Solution

The fourth proportional to 13,117.02, 18,099.37 and 7,811.70 is: 10,778.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.02 : 18,099.37 = 7,811.70 : x
  2. Step 2: Convert to fraction form
    13,117.02/18,099.37 = 7,811.70/x
  3. Step 3: Cross multiply
    13,117.02x = 18,099.37 × 7,811.70
  4. Step 4: Simplify right side
    13,117.02x = 141,386,848.63
  5. Step 5: Solve for x
    x = 141,386,848.63/13,117.02
  6. Step 6: Final answer
    x = 10,778.88

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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.