Home / 15,415.02-21,281.88-10,119.12

Finding the Fourth Proportional to 15,415.02, 21,281.88 and 10,119.12

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Solution

The fourth proportional to 15,415.02, 21,281.88 and 10,119.12 is: 13,970.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,415.02 : 21,281.88 = 10,119.12 : x
  2. Step 2: Convert to fraction form
    15,415.02/21,281.88 = 10,119.12/x
  3. Step 3: Cross multiply
    15,415.02x = 21,281.88 × 10,119.12
  4. Step 4: Simplify right side
    15,415.02x = 215,353,897.55
  5. Step 5: Solve for x
    x = 215,353,897.55/15,415.02
  6. Step 6: Final answer
    x = 13,970.39

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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.