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Finding the Fourth Proportional to 15,476.80, 21,328.80 and 15,246.40

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Solution

The fourth proportional to 15,476.80, 21,328.80 and 15,246.40 is: 21,011.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,476.80 : 21,328.80 = 15,246.40 : x
  2. Step 2: Convert to fraction form
    15,476.80/21,328.80 = 15,246.40/x
  3. Step 3: Cross multiply
    15,476.80x = 21,328.80 × 15,246.40
  4. Step 4: Simplify right side
    15,476.80x = 325,187,416.32
  5. Step 5: Solve for x
    x = 325,187,416.32/15,476.80
  6. Step 6: Final answer
    x = 21,011.28

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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.