Home / 28,275.48-39,019.86-15,700.32

Finding the Fourth Proportional to 28,275.48, 39,019.86 and 15,700.32

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Solution

The fourth proportional to 28,275.48, 39,019.86 and 15,700.32 is: 21,666.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,275.48 : 39,019.86 = 15,700.32 : x
  2. Step 2: Convert to fraction form
    28,275.48/39,019.86 = 15,700.32/x
  3. Step 3: Cross multiply
    28,275.48x = 39,019.86 × 15,700.32
  4. Step 4: Simplify right side
    28,275.48x = 612,624,288.36
  5. Step 5: Solve for x
    x = 612,624,288.36/28,275.48
  6. Step 6: Final answer
    x = 21,666.27

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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.