Home / 15,666.84-21,607.68-13,774.40

Finding the Fourth Proportional to 15,666.84, 21,607.68 and 13,774.40

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Solution

The fourth proportional to 15,666.84, 21,607.68 and 13,774.40 is: 18,997.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.84 : 21,607.68 = 13,774.40 : x
  2. Step 2: Convert to fraction form
    15,666.84/21,607.68 = 13,774.40/x
  3. Step 3: Cross multiply
    15,666.84x = 21,607.68 × 13,774.40
  4. Step 4: Simplify right side
    15,666.84x = 297,632,827.39
  5. Step 5: Solve for x
    x = 297,632,827.39/15,666.84
  6. Step 6: Final answer
    x = 18,997.63

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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.