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Finding the Fourth Proportional to 15,873.30, 21,904.28 and 8,703.21

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Solution

The fourth proportional to 15,873.30, 21,904.28 and 8,703.21 is: 12,009.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.30 : 21,904.28 = 8,703.21 : x
  2. Step 2: Convert to fraction form
    15,873.30/21,904.28 = 8,703.21/x
  3. Step 3: Cross multiply
    15,873.30x = 21,904.28 × 8,703.21
  4. Step 4: Simplify right side
    15,873.30x = 190,637,505.22
  5. Step 5: Solve for x
    x = 190,637,505.22/15,873.30
  6. Step 6: Final answer
    x = 12,009.95

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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.