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Finding the Fourth Proportional to 28,706, 42,904.98 and 25,888.40

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Solution

The fourth proportional to 28,706, 42,904.98 and 25,888.40 is: 38,693.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,706 : 42,904.98 = 25,888.40 : x
  2. Step 2: Convert to fraction form
    28,706/42,904.98 = 25,888.40/x
  3. Step 3: Cross multiply
    28,706x = 42,904.98 × 25,888.40
  4. Step 4: Simplify right side
    28,706x = 1,110,741,284.23
  5. Step 5: Solve for x
    x = 1,110,741,284.23/28,706
  6. Step 6: Final answer
    x = 38,693.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.