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Finding the Fourth Proportional to 28,470.62, 39,288.03 and 15,892.94

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Solution

The fourth proportional to 28,470.62, 39,288.03 and 15,892.94 is: 21,931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.62 : 39,288.03 = 15,892.94 : x
  2. Step 2: Convert to fraction form
    28,470.62/39,288.03 = 15,892.94/x
  3. Step 3: Cross multiply
    28,470.62x = 39,288.03 × 15,892.94
  4. Step 4: Simplify right side
    28,470.62x = 624,402,303.51
  5. Step 5: Solve for x
    x = 624,402,303.51/28,470.62
  6. Step 6: Final answer
    x = 21,931.46

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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.