Home / 15,864.60-21,848.86-15,520.15

Finding the Fourth Proportional to 15,864.60, 21,848.86 and 15,520.15

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Solution

The fourth proportional to 15,864.60, 21,848.86 and 15,520.15 is: 21,374.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.60 : 21,848.86 = 15,520.15 : x
  2. Step 2: Convert to fraction form
    15,864.60/21,848.86 = 15,520.15/x
  3. Step 3: Cross multiply
    15,864.60x = 21,848.86 × 15,520.15
  4. Step 4: Simplify right side
    15,864.60x = 339,097,491.11
  5. Step 5: Solve for x
    x = 339,097,491.11/15,864.60
  6. Step 6: Final answer
    x = 21,374.47

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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.