Home / 13,210.81-18,230.78-7,242.58

Finding the Fourth Proportional to 13,210.81, 18,230.78 and 7,242.58

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Solution

The fourth proportional to 13,210.81, 18,230.78 and 7,242.58 is: 9,994.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,210.81 : 18,230.78 = 7,242.58 : x
  2. Step 2: Convert to fraction form
    13,210.81/18,230.78 = 7,242.58/x
  3. Step 3: Cross multiply
    13,210.81x = 18,230.78 × 7,242.58
  4. Step 4: Simplify right side
    13,210.81x = 132,037,882.61
  5. Step 5: Solve for x
    x = 132,037,882.61/13,210.81
  6. Step 6: Final answer
    x = 9,994.68

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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.