Home / 13,107.48-18,088.47-7,139.19

Finding the Fourth Proportional to 13,107.48, 18,088.47 and 7,139.19

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Solution

The fourth proportional to 13,107.48, 18,088.47 and 7,139.19 is: 9,852.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.48 : 18,088.47 = 7,139.19 : x
  2. Step 2: Convert to fraction form
    13,107.48/18,088.47 = 7,139.19/x
  3. Step 3: Cross multiply
    13,107.48x = 18,088.47 × 7,139.19
  4. Step 4: Simplify right side
    13,107.48x = 129,137,065.20
  5. Step 5: Solve for x
    x = 129,137,065.20/13,107.48
  6. Step 6: Final answer
    x = 9,852.17

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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.