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Finding the Fourth Proportional to 28,047, 38,705.59 and 15,300.39

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Solution

The fourth proportional to 28,047, 38,705.59 and 15,300.39 is: 21,114.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,047 : 38,705.59 = 15,300.39 : x
  2. Step 2: Convert to fraction form
    28,047/38,705.59 = 15,300.39/x
  3. Step 3: Cross multiply
    28,047x = 38,705.59 × 15,300.39
  4. Step 4: Simplify right side
    28,047x = 592,210,583.93
  5. Step 5: Solve for x
    x = 592,210,583.93/28,047
  6. Step 6: Final answer
    x = 21,114.94

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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.