Home / 27,628.10-38,123.29-15,688.90

Finding the Fourth Proportional to 27,628.10, 38,123.29 and 15,688.90

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Solution

The fourth proportional to 27,628.10, 38,123.29 and 15,688.90 is: 21,648.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,628.10 : 38,123.29 = 15,688.90 : x
  2. Step 2: Convert to fraction form
    27,628.10/38,123.29 = 15,688.90/x
  3. Step 3: Cross multiply
    27,628.10x = 38,123.29 × 15,688.90
  4. Step 4: Simplify right side
    27,628.10x = 598,112,484.48
  5. Step 5: Solve for x
    x = 598,112,484.48/27,628.10
  6. Step 6: Final answer
    x = 21,648.70

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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.