Home / 21,423.61-29,533.78-15,030.40

Finding the Fourth Proportional to 21,423.61, 29,533.78 and 15,030.40

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Solution

The fourth proportional to 21,423.61, 29,533.78 and 15,030.40 is: 20,720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.61 : 29,533.78 = 15,030.40 : x
  2. Step 2: Convert to fraction form
    21,423.61/29,533.78 = 15,030.40/x
  3. Step 3: Cross multiply
    21,423.61x = 29,533.78 × 15,030.40
  4. Step 4: Simplify right side
    21,423.61x = 443,904,422.30
  5. Step 5: Solve for x
    x = 443,904,422.30/21,423.61
  6. Step 6: Final answer
    x = 20,720.33

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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.