Home / 15,905.49-21,955.47-13,658.34

Finding the Fourth Proportional to 15,905.49, 21,955.47 and 13,658.34

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Solution

The fourth proportional to 15,905.49, 21,955.47 and 13,658.34 is: 18,853.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.49 : 21,955.47 = 13,658.34 : x
  2. Step 2: Convert to fraction form
    15,905.49/21,955.47 = 13,658.34/x
  3. Step 3: Cross multiply
    15,905.49x = 21,955.47 × 13,658.34
  4. Step 4: Simplify right side
    15,905.49x = 299,875,274.12
  5. Step 5: Solve for x
    x = 299,875,274.12/15,905.49
  6. Step 6: Final answer
    x = 18,853.57

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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.