Home / 28,569.24-42,870.06-15,421.32

Finding the Fourth Proportional to 28,569.24, 42,870.06 and 15,421.32

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Solution

The fourth proportional to 28,569.24, 42,870.06 and 15,421.32 is: 23,140.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.24 : 42,870.06 = 15,421.32 : x
  2. Step 2: Convert to fraction form
    28,569.24/42,870.06 = 15,421.32/x
  3. Step 3: Cross multiply
    28,569.24x = 42,870.06 × 15,421.32
  4. Step 4: Simplify right side
    28,569.24x = 661,112,913.68
  5. Step 5: Solve for x
    x = 661,112,913.68/28,569.24
  6. Step 6: Final answer
    x = 23,140.72

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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.