Home / 12,931.64-19,398.42-4,172.84

Finding the Fourth Proportional to 12,931.64, 19,398.42 and 4,172.84

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Solution

The fourth proportional to 12,931.64, 19,398.42 and 4,172.84 is: 6,259.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.64 : 19,398.42 = 4,172.84 : x
  2. Step 2: Convert to fraction form
    12,931.64/19,398.42 = 4,172.84/x
  3. Step 3: Cross multiply
    12,931.64x = 19,398.42 × 4,172.84
  4. Step 4: Simplify right side
    12,931.64x = 80,946,502.91
  5. Step 5: Solve for x
    x = 80,946,502.91/12,931.64
  6. Step 6: Final answer
    x = 6,259.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.