Home / 21,470.59-29,615.78-15,511.01

Finding the Fourth Proportional to 21,470.59, 29,615.78 and 15,511.01

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Solution

The fourth proportional to 21,470.59, 29,615.78 and 15,511.01 is: 21,395.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,470.59 : 29,615.78 = 15,511.01 : x
  2. Step 2: Convert to fraction form
    21,470.59/29,615.78 = 15,511.01/x
  3. Step 3: Cross multiply
    21,470.59x = 29,615.78 × 15,511.01
  4. Step 4: Simplify right side
    21,470.59x = 459,370,582.18
  5. Step 5: Solve for x
    x = 459,370,582.18/21,470.59
  6. Step 6: Final answer
    x = 21,395.35

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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.