Home / 15,153.93-20,931.47-12,771.81

Finding the Fourth Proportional to 15,153.93, 20,931.47 and 12,771.81

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Solution

The fourth proportional to 15,153.93, 20,931.47 and 12,771.81 is: 17,641.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.93 : 20,931.47 = 12,771.81 : x
  2. Step 2: Convert to fraction form
    15,153.93/20,931.47 = 12,771.81/x
  3. Step 3: Cross multiply
    15,153.93x = 20,931.47 × 12,771.81
  4. Step 4: Simplify right side
    15,153.93x = 267,332,694.00
  5. Step 5: Solve for x
    x = 267,332,694.00/15,153.93
  6. Step 6: Final answer
    x = 17,641.15

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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.