Home / 28,701.64-43,011.58-21,145.78

Finding the Fourth Proportional to 28,701.64, 43,011.58 and 21,145.78

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Solution

The fourth proportional to 28,701.64, 43,011.58 and 21,145.78 is: 31,688.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,701.64 : 43,011.58 = 21,145.78 : x
  2. Step 2: Convert to fraction form
    28,701.64/43,011.58 = 21,145.78/x
  3. Step 3: Cross multiply
    28,701.64x = 43,011.58 × 21,145.78
  4. Step 4: Simplify right side
    28,701.64x = 909,513,408.13
  5. Step 5: Solve for x
    x = 909,513,408.13/28,701.64
  6. Step 6: Final answer
    x = 31,688.55

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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.