Home / 28,490.64-42,763.50-13,709.76

Finding the Fourth Proportional to 28,490.64, 42,763.50 and 13,709.76

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Solution

The fourth proportional to 28,490.64, 42,763.50 and 13,709.76 is: 20,577.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.64 : 42,763.50 = 13,709.76 : x
  2. Step 2: Convert to fraction form
    28,490.64/42,763.50 = 13,709.76/x
  3. Step 3: Cross multiply
    28,490.64x = 42,763.50 × 13,709.76
  4. Step 4: Simplify right side
    28,490.64x = 586,277,321.76
  5. Step 5: Solve for x
    x = 586,277,321.76/28,490.64
  6. Step 6: Final answer
    x = 20,577.89

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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.