Home / 13,107.58-18,088.70-7,139.28

Finding the Fourth Proportional to 13,107.58, 18,088.70 and 7,139.28

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Solution

The fourth proportional to 13,107.58, 18,088.70 and 7,139.28 is: 9,852.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.58 : 18,088.70 = 7,139.28 : x
  2. Step 2: Convert to fraction form
    13,107.58/18,088.70 = 7,139.28/x
  3. Step 3: Cross multiply
    13,107.58x = 18,088.70 × 7,139.28
  4. Step 4: Simplify right side
    13,107.58x = 129,140,294.14
  5. Step 5: Solve for x
    x = 129,140,294.14/13,107.58
  6. Step 6: Final answer
    x = 9,852.34

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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.