Home / 28,461.40-39,275.70-15,714.30

Finding the Fourth Proportional to 28,461.40, 39,275.70 and 15,714.30

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Solution

The fourth proportional to 28,461.40, 39,275.70 and 15,714.30 is: 21,685.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,461.40 : 39,275.70 = 15,714.30 : x
  2. Step 2: Convert to fraction form
    28,461.40/39,275.70 = 15,714.30/x
  3. Step 3: Cross multiply
    28,461.40x = 39,275.70 × 15,714.30
  4. Step 4: Simplify right side
    28,461.40x = 617,190,220.87
  5. Step 5: Solve for x
    x = 617,190,220.87/28,461.40
  6. Step 6: Final answer
    x = 21,685.17

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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.