Home / 28,368.96-39,148.84-15,621.89

Finding the Fourth Proportional to 28,368.96, 39,148.84 and 15,621.89

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Solution

The fourth proportional to 28,368.96, 39,148.84 and 15,621.89 is: 21,558.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.96 : 39,148.84 = 15,621.89 : x
  2. Step 2: Convert to fraction form
    28,368.96/39,148.84 = 15,621.89/x
  3. Step 3: Cross multiply
    28,368.96x = 39,148.84 × 15,621.89
  4. Step 4: Simplify right side
    28,368.96x = 611,578,849.93
  5. Step 5: Solve for x
    x = 611,578,849.93/28,368.96
  6. Step 6: Final answer
    x = 21,558.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.