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Finding the Fourth Proportional to 28,064.59, 38,703.84 and 21,681.58

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Solution

The fourth proportional to 28,064.59, 38,703.84 and 21,681.58 is: 29,901.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,064.59 : 38,703.84 = 21,681.58 : x
  2. Step 2: Convert to fraction form
    28,064.59/38,703.84 = 21,681.58/x
  3. Step 3: Cross multiply
    28,064.59x = 38,703.84 × 21,681.58
  4. Step 4: Simplify right side
    28,064.59x = 839,160,403.27
  5. Step 5: Solve for x
    x = 839,160,403.27/28,064.59
  6. Step 6: Final answer
    x = 29,901.04

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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.