Home / 15,501.98-21,400.08-9,916.22

Finding the Fourth Proportional to 15,501.98, 21,400.08 and 9,916.22

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Solution

The fourth proportional to 15,501.98, 21,400.08 and 9,916.22 is: 13,689.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.98 : 21,400.08 = 9,916.22 : x
  2. Step 2: Convert to fraction form
    15,501.98/21,400.08 = 9,916.22/x
  3. Step 3: Cross multiply
    15,501.98x = 21,400.08 × 9,916.22
  4. Step 4: Simplify right side
    15,501.98x = 212,207,901.30
  5. Step 5: Solve for x
    x = 212,207,901.30/15,501.98
  6. Step 6: Final answer
    x = 13,689.08

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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.