Home / 28,678.23-39,582.28-15,935.79

Finding the Fourth Proportional to 28,678.23, 39,582.28 and 15,935.79

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Solution

The fourth proportional to 28,678.23, 39,582.28 and 15,935.79 is: 21,994.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,678.23 : 39,582.28 = 15,935.79 : x
  2. Step 2: Convert to fraction form
    28,678.23/39,582.28 = 15,935.79/x
  3. Step 3: Cross multiply
    28,678.23x = 39,582.28 × 15,935.79
  4. Step 4: Simplify right side
    28,678.23x = 630,774,703.89
  5. Step 5: Solve for x
    x = 630,774,703.89/28,678.23
  6. Step 6: Final answer
    x = 21,994.90

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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.