Home / 28,347.92-42,686.56-21,004.40

Finding the Fourth Proportional to 28,347.92, 42,686.56 and 21,004.40

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Solution

The fourth proportional to 28,347.92, 42,686.56 and 21,004.40 is: 31,628.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,347.92 : 42,686.56 = 21,004.40 : x
  2. Step 2: Convert to fraction form
    28,347.92/42,686.56 = 21,004.40/x
  3. Step 3: Cross multiply
    28,347.92x = 42,686.56 × 21,004.40
  4. Step 4: Simplify right side
    28,347.92x = 896,605,580.86
  5. Step 5: Solve for x
    x = 896,605,580.86/28,347.92
  6. Step 6: Final answer
    x = 31,628.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.