Home / 15,533.10-21,420.84-10,440.12

Finding the Fourth Proportional to 15,533.10, 21,420.84 and 10,440.12

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Solution

The fourth proportional to 15,533.10, 21,420.84 and 10,440.12 is: 14,397.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,533.10 : 21,420.84 = 10,440.12 : x
  2. Step 2: Convert to fraction form
    15,533.10/21,420.84 = 10,440.12/x
  3. Step 3: Cross multiply
    15,533.10x = 21,420.84 × 10,440.12
  4. Step 4: Simplify right side
    15,533.10x = 223,636,140.10
  5. Step 5: Solve for x
    x = 223,636,140.10/15,533.10
  6. Step 6: Final answer
    x = 14,397.39

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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.