Home / 28,510.32-42,781.32-11,867.28

Finding the Fourth Proportional to 28,510.32, 42,781.32 and 11,867.28

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Solution

The fourth proportional to 28,510.32, 42,781.32 and 11,867.28 is: 17,807.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,510.32 : 42,781.32 = 11,867.28 : x
  2. Step 2: Convert to fraction form
    28,510.32/42,781.32 = 11,867.28/x
  3. Step 3: Cross multiply
    28,510.32x = 42,781.32 × 11,867.28
  4. Step 4: Simplify right side
    28,510.32x = 507,697,903.21
  5. Step 5: Solve for x
    x = 507,697,903.21/28,510.32
  6. Step 6: Final answer
    x = 17,807.51

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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.