Home / 21,031.54-28,988.35-18,472.75

Finding the Fourth Proportional to 21,031.54, 28,988.35 and 18,472.75

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Solution

The fourth proportional to 21,031.54, 28,988.35 and 18,472.75 is: 25,461.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.54 : 28,988.35 = 18,472.75 : x
  2. Step 2: Convert to fraction form
    21,031.54/28,988.35 = 18,472.75/x
  3. Step 3: Cross multiply
    21,031.54x = 28,988.35 × 18,472.75
  4. Step 4: Simplify right side
    21,031.54x = 535,494,423.81
  5. Step 5: Solve for x
    x = 535,494,423.81/21,031.54
  6. Step 6: Final answer
    x = 25,461.50

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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.