Home / 13,478.13-18,599.81-7,509.78

Finding the Fourth Proportional to 13,478.13, 18,599.81 and 7,509.78

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Solution

The fourth proportional to 13,478.13, 18,599.81 and 7,509.78 is: 10,363.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.13 : 18,599.81 = 7,509.78 : x
  2. Step 2: Convert to fraction form
    13,478.13/18,599.81 = 7,509.78/x
  3. Step 3: Cross multiply
    13,478.13x = 18,599.81 × 7,509.78
  4. Step 4: Simplify right side
    13,478.13x = 139,680,443.59
  5. Step 5: Solve for x
    x = 139,680,443.59/13,478.13
  6. Step 6: Final answer
    x = 10,363.49

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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.