Home / 28,437.10-42,664.31-13,455.72

Finding the Fourth Proportional to 28,437.10, 42,664.31 and 13,455.72

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Solution

The fourth proportional to 28,437.10, 42,664.31 and 13,455.72 is: 20,187.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.10 : 42,664.31 = 13,455.72 : x
  2. Step 2: Convert to fraction form
    28,437.10/42,664.31 = 13,455.72/x
  3. Step 3: Cross multiply
    28,437.10x = 42,664.31 × 13,455.72
  4. Step 4: Simplify right side
    28,437.10x = 574,079,009.35
  5. Step 5: Solve for x
    x = 574,079,009.35/28,437.10
  6. Step 6: Final answer
    x = 20,187.68

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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.