Home / 28,303.40-39,060.42-15,728.04

Finding the Fourth Proportional to 28,303.40, 39,060.42 and 15,728.04

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Solution

The fourth proportional to 28,303.40, 39,060.42 and 15,728.04 is: 21,705.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,303.40 : 39,060.42 = 15,728.04 : x
  2. Step 2: Convert to fraction form
    28,303.40/39,060.42 = 15,728.04/x
  3. Step 3: Cross multiply
    28,303.40x = 39,060.42 × 15,728.04
  4. Step 4: Simplify right side
    28,303.40x = 614,343,848.18
  5. Step 5: Solve for x
    x = 614,343,848.18/28,303.40
  6. Step 6: Final answer
    x = 21,705.66

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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.