Home / 18,931.74-26,129.70-12,558.72

Finding the Fourth Proportional to 18,931.74, 26,129.70 and 12,558.72

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Solution

The fourth proportional to 18,931.74, 26,129.70 and 12,558.72 is: 17,333.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.74 : 26,129.70 = 12,558.72 : x
  2. Step 2: Convert to fraction form
    18,931.74/26,129.70 = 12,558.72/x
  3. Step 3: Cross multiply
    18,931.74x = 26,129.70 × 12,558.72
  4. Step 4: Simplify right side
    18,931.74x = 328,155,585.98
  5. Step 5: Solve for x
    x = 328,155,585.98/18,931.74
  6. Step 6: Final answer
    x = 17,333.62

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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.