Home / 15,871.04-21,900.85-8,699.81

Finding the Fourth Proportional to 15,871.04, 21,900.85 and 8,699.81

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Solution

The fourth proportional to 15,871.04, 21,900.85 and 8,699.81 is: 12,005.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,871.04 : 21,900.85 = 8,699.81 : x
  2. Step 2: Convert to fraction form
    15,871.04/21,900.85 = 8,699.81/x
  3. Step 3: Cross multiply
    15,871.04x = 21,900.85 × 8,699.81
  4. Step 4: Simplify right side
    15,871.04x = 190,533,233.84
  5. Step 5: Solve for x
    x = 190,533,233.84/15,871.04
  6. Step 6: Final answer
    x = 12,005.09

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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.