Finding the Fourth Proportional to 28,423,928.40, 39,237,830.92 and 18,124,495.44
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Solution
The fourth proportional to 28,423,928.40, 39,237,830.92 and 18,124,495.44 is: 25,019,971.82
Step by Step Solution
- Step 1: Write the proportion equation
28,423,928.40 : 39,237,830.92 = 18,124,495.44 : x - Step 2: Convert to fraction form
28,423,928.40/39,237,830.92 = 18,124,495.44/x - Step 3: Cross multiply
28,423,928.40x = 39,237,830.92 × 18,124,495.44 - Step 4: Simplify right side
28,423,928.40x = 711,165,887,585,031.12 - Step 5: Solve for x
x = 711,165,887,585,031.12/28,423,928.40 - Step 6: Final answer
x = 25,019,971.82
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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.