Home / 13,127.16-18,107.34-7,818.84

Finding the Fourth Proportional to 13,127.16, 18,107.34 and 7,818.84

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Solution

The fourth proportional to 13,127.16, 18,107.34 and 7,818.84 is: 10,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,127.16 : 18,107.34 = 7,818.84 : x
  2. Step 2: Convert to fraction form
    13,127.16/18,107.34 = 7,818.84/x
  3. Step 3: Cross multiply
    13,127.16x = 18,107.34 × 7,818.84
  4. Step 4: Simplify right side
    13,127.16x = 141,578,394.29
  5. Step 5: Solve for x
    x = 141,578,394.29/13,127.16
  6. Step 6: Final answer
    x = 10,785.15

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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.