Home / 19,871.84-27,412.56-12,315.68

Finding the Fourth Proportional to 19,871.84, 27,412.56 and 12,315.68

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Solution

The fourth proportional to 19,871.84, 27,412.56 and 12,315.68 is: 16,989.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,871.84 : 27,412.56 = 12,315.68 : x
  2. Step 2: Convert to fraction form
    19,871.84/27,412.56 = 12,315.68/x
  3. Step 3: Cross multiply
    19,871.84x = 27,412.56 × 12,315.68
  4. Step 4: Simplify right side
    19,871.84x = 337,604,316.94
  5. Step 5: Solve for x
    x = 337,604,316.94/19,871.84
  6. Step 6: Final answer
    x = 16,989.08

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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.