Finding the Fourth Proportional to 12,478,467.40, 18,717,701.10 and 10,210,985.80
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Solution
The fourth proportional to 12,478,467.40, 18,717,701.10 and 10,210,985.80 is: 15,316,478.70
Step by Step Solution
- Step 1: Write the proportion equation
12,478,467.40 : 18,717,701.10 = 10,210,985.80 : x - Step 2: Convert to fraction form
12,478,467.40/18,717,701.10 = 10,210,985.80/x - Step 3: Cross multiply
12,478,467.40x = 18,717,701.10 × 10,210,985.80 - Step 4: Simplify right side
12,478,467.40x = 191,126,180,140,744.41 - Step 5: Solve for x
x = 191,126,180,140,744.41/12,478,467.40 - Step 6: Final answer
x = 15,316,478.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.