Home / 15,139.71-20,888.62-9,088.40

Finding the Fourth Proportional to 15,139.71, 20,888.62 and 9,088.40

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Solution

The fourth proportional to 15,139.71, 20,888.62 and 9,088.40 is: 12,539.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.71 : 20,888.62 = 9,088.40 : x
  2. Step 2: Convert to fraction form
    15,139.71/20,888.62 = 9,088.40/x
  3. Step 3: Cross multiply
    15,139.71x = 20,888.62 × 9,088.40
  4. Step 4: Simplify right side
    15,139.71x = 189,844,163.51
  5. Step 5: Solve for x
    x = 189,844,163.51/15,139.71
  6. Step 6: Final answer
    x = 12,539.48

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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.