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Finding the Fourth Proportional to 28,011, 38,655.59 and 15,435.75

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Solution

The fourth proportional to 28,011, 38,655.59 and 15,435.75 is: 21,301.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011 : 38,655.59 = 15,435.75 : x
  2. Step 2: Convert to fraction form
    28,011/38,655.59 = 15,435.75/x
  3. Step 3: Cross multiply
    28,011x = 38,655.59 × 15,435.75
  4. Step 4: Simplify right side
    28,011x = 596,677,946.16
  5. Step 5: Solve for x
    x = 596,677,946.16/28,011
  6. Step 6: Final answer
    x = 21,301.56

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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.