Home / 28,262.98-42,423.99-20,875.78

Finding the Fourth Proportional to 28,262.98, 42,423.99 and 20,875.78

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Solution

The fourth proportional to 28,262.98, 42,423.99 and 20,875.78 is: 31,335.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,262.98 : 42,423.99 = 20,875.78 : x
  2. Step 2: Convert to fraction form
    28,262.98/42,423.99 = 20,875.78/x
  3. Step 3: Cross multiply
    28,262.98x = 42,423.99 × 20,875.78
  4. Step 4: Simplify right side
    28,262.98x = 885,633,881.96
  5. Step 5: Solve for x
    x = 885,633,881.96/28,262.98
  6. Step 6: Final answer
    x = 31,335.47

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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.