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Finding the Fourth Proportional to 28,008, 38,653.47 and 15,435.18

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Solution

The fourth proportional to 28,008, 38,653.47 and 15,435.18 is: 21,301.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,008 : 38,653.47 = 15,435.18 : x
  2. Step 2: Convert to fraction form
    28,008/38,653.47 = 15,435.18/x
  3. Step 3: Cross multiply
    28,008x = 38,653.47 × 15,435.18
  4. Step 4: Simplify right side
    28,008x = 596,623,267.07
  5. Step 5: Solve for x
    x = 596,623,267.07/28,008
  6. Step 6: Final answer
    x = 21,301.89

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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.