Home / 28,315.04-39,075.36-15,739.52

Finding the Fourth Proportional to 28,315.04, 39,075.36 and 15,739.52

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Solution

The fourth proportional to 28,315.04, 39,075.36 and 15,739.52 is: 21,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,315.04 : 39,075.36 = 15,739.52 : x
  2. Step 2: Convert to fraction form
    28,315.04/39,075.36 = 15,739.52/x
  3. Step 3: Cross multiply
    28,315.04x = 39,075.36 × 15,739.52
  4. Step 4: Simplify right side
    28,315.04x = 615,027,410.23
  5. Step 5: Solve for x
    x = 615,027,410.23/28,315.04
  6. Step 6: Final answer
    x = 21,720.87

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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.