Home / 28,478.48-39,300.36-15,903.68

Finding the Fourth Proportional to 28,478.48, 39,300.36 and 15,903.68

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Solution

The fourth proportional to 28,478.48, 39,300.36 and 15,903.68 is: 21,947.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.48 : 39,300.36 = 15,903.68 : x
  2. Step 2: Convert to fraction form
    28,478.48/39,300.36 = 15,903.68/x
  3. Step 3: Cross multiply
    28,478.48x = 39,300.36 × 15,903.68
  4. Step 4: Simplify right side
    28,478.48x = 625,020,349.32
  5. Step 5: Solve for x
    x = 625,020,349.32/28,478.48
  6. Step 6: Final answer
    x = 21,947.11

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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.