Home / 28,681.36-39,579-15,935.44

Finding the Fourth Proportional to 28,681.36, 39,579 and 15,935.44

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Solution

The fourth proportional to 28,681.36, 39,579 and 15,935.44 is: 21,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,681.36 : 39,579 = 15,935.44 : x
  2. Step 2: Convert to fraction form
    28,681.36/39,579 = 15,935.44/x
  3. Step 3: Cross multiply
    28,681.36x = 39,579 × 15,935.44
  4. Step 4: Simplify right side
    28,681.36x = 630,708,779.76
  5. Step 5: Solve for x
    x = 630,708,779.76/28,681.36
  6. Step 6: Final answer
    x = 21,990.20

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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.