Home / 13,107.63-18,088.73-7,139.29

Finding the Fourth Proportional to 13,107.63, 18,088.73 and 7,139.29

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Solution

The fourth proportional to 13,107.63, 18,088.73 and 7,139.29 is: 9,852.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.63 : 18,088.73 = 7,139.29 : x
  2. Step 2: Convert to fraction form
    13,107.63/18,088.73 = 7,139.29/x
  3. Step 3: Cross multiply
    13,107.63x = 18,088.73 × 7,139.29
  4. Step 4: Simplify right side
    13,107.63x = 129,140,689.20
  5. Step 5: Solve for x
    x = 129,140,689.20/13,107.63
  6. Step 6: Final answer
    x = 9,852.33

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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.