Home / 28,528.48-39,368.55-15,782.19

Finding the Fourth Proportional to 28,528.48, 39,368.55 and 15,782.19

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Solution

The fourth proportional to 28,528.48, 39,368.55 and 15,782.19 is: 21,779.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,528.48 : 39,368.55 = 15,782.19 : x
  2. Step 2: Convert to fraction form
    28,528.48/39,368.55 = 15,782.19/x
  3. Step 3: Cross multiply
    28,528.48x = 39,368.55 × 15,782.19
  4. Step 4: Simplify right side
    28,528.48x = 621,321,936.12
  5. Step 5: Solve for x
    x = 621,321,936.12/28,528.48
  6. Step 6: Final answer
    x = 21,779.01

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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.