Home / 13,557.87-18,707.63-8,518.51

Finding the Fourth Proportional to 13,557.87, 18,707.63 and 8,518.51

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Solution

The fourth proportional to 13,557.87, 18,707.63 and 8,518.51 is: 11,754.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,557.87 : 18,707.63 = 8,518.51 : x
  2. Step 2: Convert to fraction form
    13,557.87/18,707.63 = 8,518.51/x
  3. Step 3: Cross multiply
    13,557.87x = 18,707.63 × 8,518.51
  4. Step 4: Simplify right side
    13,557.87x = 159,361,133.23
  5. Step 5: Solve for x
    x = 159,361,133.23/13,557.87
  6. Step 6: Final answer
    x = 11,754.14

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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.