Home / 23,138.91-31,931.55-12,528.51

Finding the Fourth Proportional to 23,138.91, 31,931.55 and 12,528.51

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Solution

The fourth proportional to 23,138.91, 31,931.55 and 12,528.51 is: 17,289.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,138.91 : 31,931.55 = 12,528.51 : x
  2. Step 2: Convert to fraction form
    23,138.91/31,931.55 = 12,528.51/x
  3. Step 3: Cross multiply
    23,138.91x = 31,931.55 × 12,528.51
  4. Step 4: Simplify right side
    23,138.91x = 400,054,743.49
  5. Step 5: Solve for x
    x = 400,054,743.49/23,138.91
  6. Step 6: Final answer
    x = 17,289.26

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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.