Home / 20,985.36-28,897.30-20,519.68

Finding the Fourth Proportional to 20,985.36, 28,897.30 and 20,519.68

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Solution

The fourth proportional to 20,985.36, 28,897.30 and 20,519.68 is: 28,256.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.36 : 28,897.30 = 20,519.68 : x
  2. Step 2: Convert to fraction form
    20,985.36/28,897.30 = 20,519.68/x
  3. Step 3: Cross multiply
    20,985.36x = 28,897.30 × 20,519.68
  4. Step 4: Simplify right side
    20,985.36x = 592,963,348.86
  5. Step 5: Solve for x
    x = 592,963,348.86/20,985.36
  6. Step 6: Final answer
    x = 28,256.05

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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.