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Finding the Fourth Proportional to 28,609.84, 42,904.23 and 9,885.07

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Solution

The fourth proportional to 28,609.84, 42,904.23 and 9,885.07 is: 14,823.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,609.84 : 42,904.23 = 9,885.07 : x
  2. Step 2: Convert to fraction form
    28,609.84/42,904.23 = 9,885.07/x
  3. Step 3: Cross multiply
    28,609.84x = 42,904.23 × 9,885.07
  4. Step 4: Simplify right side
    28,609.84x = 424,111,316.85
  5. Step 5: Solve for x
    x = 424,111,316.85/28,609.84
  6. Step 6: Final answer
    x = 14,823.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.