Home / 28,486.02-39,312.99-15,740.31

Finding the Fourth Proportional to 28,486.02, 39,312.99 and 15,740.31

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Solution

The fourth proportional to 28,486.02, 39,312.99 and 15,740.31 is: 21,722.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.02 : 39,312.99 = 15,740.31 : x
  2. Step 2: Convert to fraction form
    28,486.02/39,312.99 = 15,740.31/x
  3. Step 3: Cross multiply
    28,486.02x = 39,312.99 × 15,740.31
  4. Step 4: Simplify right side
    28,486.02x = 618,798,649.63
  5. Step 5: Solve for x
    x = 618,798,649.63/28,486.02
  6. Step 6: Final answer
    x = 21,722.89

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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.