Home / 15,501.87-21,392.67-9,128.70

Finding the Fourth Proportional to 15,501.87, 21,392.67 and 9,128.70

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Solution

The fourth proportional to 15,501.87, 21,392.67 and 9,128.70 is: 12,597.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.87 : 21,392.67 = 9,128.70 : x
  2. Step 2: Convert to fraction form
    15,501.87/21,392.67 = 9,128.70/x
  3. Step 3: Cross multiply
    15,501.87x = 21,392.67 × 9,128.70
  4. Step 4: Simplify right side
    15,501.87x = 195,287,266.63
  5. Step 5: Solve for x
    x = 195,287,266.63/15,501.87
  6. Step 6: Final answer
    x = 12,597.66

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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.