Home / 21,010.32-28,981.80-14,750.64

Finding the Fourth Proportional to 21,010.32, 28,981.80 and 14,750.64

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Solution

The fourth proportional to 21,010.32, 28,981.80 and 14,750.64 is: 20,347.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.32 : 28,981.80 = 14,750.64 : x
  2. Step 2: Convert to fraction form
    21,010.32/28,981.80 = 14,750.64/x
  3. Step 3: Cross multiply
    21,010.32x = 28,981.80 × 14,750.64
  4. Step 4: Simplify right side
    21,010.32x = 427,500,098.35
  5. Step 5: Solve for x
    x = 427,500,098.35/21,010.32
  6. Step 6: Final answer
    x = 20,347.15

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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.