Home / 28,448.00-39,256.80-15,870.32

Finding the Fourth Proportional to 28,448.00, 39,256.80 and 15,870.32

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Solution

The fourth proportional to 28,448.00, 39,256.80 and 15,870.32 is: 21,900.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,448.00 : 39,256.80 = 15,870.32 : x
  2. Step 2: Convert to fraction form
    28,448.00/39,256.80 = 15,870.32/x
  3. Step 3: Cross multiply
    28,448.00x = 39,256.80 × 15,870.32
  4. Step 4: Simplify right side
    28,448.00x = 623,017,781.89
  5. Step 5: Solve for x
    x = 623,017,781.89/28,448.00
  6. Step 6: Final answer
    x = 21,900.24

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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.