Home / 13,124.28-18,111.24-7,155.99

Finding the Fourth Proportional to 13,124.28, 18,111.24 and 7,155.99

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Solution

The fourth proportional to 13,124.28, 18,111.24 and 7,155.99 is: 9,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.28 : 18,111.24 = 7,155.99 : x
  2. Step 2: Convert to fraction form
    13,124.28/18,111.24 = 7,155.99/x
  3. Step 3: Cross multiply
    13,124.28x = 18,111.24 × 7,155.99
  4. Step 4: Simplify right side
    13,124.28x = 129,603,852.33
  5. Step 5: Solve for x
    x = 129,603,852.33/13,124.28
  6. Step 6: Final answer
    x = 9,875.12

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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.