Home / 15,199.79-20,966.95-9,145.81

Finding the Fourth Proportional to 15,199.79, 20,966.95 and 9,145.81

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Solution

The fourth proportional to 15,199.79, 20,966.95 and 9,145.81 is: 12,615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,199.79 : 20,966.95 = 9,145.81 : x
  2. Step 2: Convert to fraction form
    15,199.79/20,966.95 = 9,145.81/x
  3. Step 3: Cross multiply
    15,199.79x = 20,966.95 × 9,145.81
  4. Step 4: Simplify right side
    15,199.79x = 191,759,778.62
  5. Step 5: Solve for x
    x = 191,759,778.62/15,199.79
  6. Step 6: Final answer
    x = 12,615.95

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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.