Home / 20,681.98-28,557.15-15,894.34

Finding the Fourth Proportional to 20,681.98, 28,557.15 and 15,894.34

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Solution

The fourth proportional to 20,681.98, 28,557.15 and 15,894.34 is: 21,946.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.98 : 28,557.15 = 15,894.34 : x
  2. Step 2: Convert to fraction form
    20,681.98/28,557.15 = 15,894.34/x
  3. Step 3: Cross multiply
    20,681.98x = 28,557.15 × 15,894.34
  4. Step 4: Simplify right side
    20,681.98x = 453,897,051.53
  5. Step 5: Solve for x
    x = 453,897,051.53/20,681.98
  6. Step 6: Final answer
    x = 21,946.50

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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.