Home / 15,547.85-21,459.50-9,881.49

Finding the Fourth Proportional to 15,547.85, 21,459.50 and 9,881.49

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Solution

The fourth proportional to 15,547.85, 21,459.50 and 9,881.49 is: 13,638.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,547.85 : 21,459.50 = 9,881.49 : x
  2. Step 2: Convert to fraction form
    15,547.85/21,459.50 = 9,881.49/x
  3. Step 3: Cross multiply
    15,547.85x = 21,459.50 × 9,881.49
  4. Step 4: Simplify right side
    15,547.85x = 212,051,834.66
  5. Step 5: Solve for x
    x = 212,051,834.66/15,547.85
  6. Step 6: Final answer
    x = 13,638.66

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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.