Home / 28,424.75-42,666.70-20,936.77

Finding the Fourth Proportional to 28,424.75, 42,666.70 and 20,936.77

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Solution

The fourth proportional to 28,424.75, 42,666.70 and 20,936.77 is: 31,426.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,424.75 : 42,666.70 = 20,936.77 : x
  2. Step 2: Convert to fraction form
    28,424.75/42,666.70 = 20,936.77/x
  3. Step 3: Cross multiply
    28,424.75x = 42,666.70 × 20,936.77
  4. Step 4: Simplify right side
    28,424.75x = 893,302,671.23
  5. Step 5: Solve for x
    x = 893,302,671.23/28,424.75
  6. Step 6: Final answer
    x = 31,426.93

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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.