Home / 28,490.40-39,320.58-21,404.52

Finding the Fourth Proportional to 28,490.40, 39,320.58 and 21,404.52

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Solution

The fourth proportional to 28,490.40, 39,320.58 and 21,404.52 is: 29,541.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.40 : 39,320.58 = 21,404.52 : x
  2. Step 2: Convert to fraction form
    28,490.40/39,320.58 = 21,404.52/x
  3. Step 3: Cross multiply
    28,490.40x = 39,320.58 × 21,404.52
  4. Step 4: Simplify right side
    28,490.40x = 841,638,141.02
  5. Step 5: Solve for x
    x = 841,638,141.02/28,490.40
  6. Step 6: Final answer
    x = 29,541.11

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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.